CQI and MCS Table Selection for Higher Order Modulation
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Solution Overview
Problem
Current wireless communication systems face challenges in managing higher order modulation and coding schemes (MCSs) due to the lack of data entries in existing channel quality indicator (CQI) and MCS tables, which limits their ability to support additional MCSs effectively.
Innovation Solution
The implementation of additional CQI and MCS tables that allow for higher order MCSs, such as 256QAM, by using multiple tables to maintain compatibility with existing systems and enable dynamic selection based on channel conditions and reporting schedules, ensuring efficient data representation and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing CQI tables and MCS tables are used, then compatibility with legacy systems is maintained, but the ability to support higher order MCSs is limited
Solution Approach 1:
The patent divides the CQI reporting mechanism into multiple tables: a legacy CQI table for backward compatibility and a new CQI table for higher order MCSs. The system selectively applies different tables based on the reporting type (periodic or aperiodic), enabling support for advanced modulation schemes without disrupting legacy operations.
Solution Approach 2:
The patent introduces a new dimension to the CQI reporting framework by adding a second CQI table that operates parallel to the legacy table. This dimensional expansion allows the system to accommodate higher order MCSs (beyond traditional QPSK, 16QAM, 64QAM) while preserving the original table structure for compatibility.
2Manufacturing precision
If a single CQI table is used, then system simplicity is maintained, but data representation efficiency for higher order MCSs is reduced
Solution Approach 1:
The patent implements a dynamic CQI table selection mechanism that adapts the table structure based on the reporting type. For periodic CQI reporting, the legacy table is used to maintain simplicity, while for aperiodic reporting, the new table is activated to provide enhanced precision for higher order MCSs. This dynamic approach optimizes data representation without permanently increasing system complexity.
3Reliability
If legacy CQI tables are used for periodic reporting, then backward compatibility is maintained, but support for higher order MCSs is limited
Solution Approach 1:
The patent introduces a new CQI table that acts as an intermediary for aperiodic reporting scenarios. This intermediate structure enables the system to bridge legacy compatibility requirements and modern higher order MCS needs by providing a dedicated table for advanced modulation schemes when triggered by aperiodic reporting events.
Data Source
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AI summary
Methods, systems, and devices are described for wireless communications. The use of at least two channel quality indicator (CQI) tables is supported. One of the at least two CQI table is identified. The identified CQI table is used to generate a CQI value for a wireless channel. In addition, the use of at least two modulation and coding scheme (MCS) tables is supported. A transmission is received via a wireless channel. One of the at least two MCS tables is identified to use for the received transmission. Further, a transport block size (TBS) table is identified that is mapped from the identified MCS table. The identified TBS table is used to determine a size of the received transmission.