Multiple MCS Tables for Efficient Dual-Codeword Decoding
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in managing multiple codewords due to limited methods for indexing modulation and coding scheme (MCS) values, often resulting in unnecessary higher modulation orders or coding rates.
Innovation Solution
Implementing multiple MCS tables for multiple codewords, allowing different MCS tables to be used for each codeword based on specific parameters, such as through the use of MCS-C-RNTI scrambling and dynamic indication in control signaling, to optimize modulation and coding schemes for improved efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single modulation and coding scheme table is used for multiple codewords, then device complexity is reduced, but communication efficiency deteriorates due to unnecessary higher modulation orders or coding rates
Solution Approach 1:
The patent divides the single MCS table into multiple separate MCS tables, with each table dedicated to a specific codeword. This segmentation allows each codeword to have its own optimized modulation and coding parameters, eliminating the need to use unnecessarily high modulation orders or coding rates for all codewords, thereby improving communication efficiency.
Solution Approach 2:
The patent applies different MCS tables to different codewords based on their specific characteristics and requirements. Each codeword can be monitored on different resources with parameters tailored to its local needs, such as using appropriate modulation orders and coding rates specific to each codeword's channel conditions and importance.
2Productivity
If multiple MCS tables are implemented for multiple codewords, then communication efficiency is improved, but device complexity increases
Solution Approach 1:
The patent performs preliminary configuration of multiple MCS tables and their associations with different codewords before actual communication occurs. The network entity pre-configures which MCS table corresponds to which codeword, so that during data transmission, the UE can directly index the appropriate table without complex real-time decision-making, reducing operational complexity while maintaining efficiency.
Solution Approach 2:
The patent introduces control signaling as an intermediary mechanism that carries indications of which MCS tables to use for different codewords. This intermediary layer manages the complexity by providing clear, structured instructions from the network entity to the UE about MCS table selection, simplifying the UE's task of managing multiple MCS tables.
3Loss of substance
If MCS schemes are tailored to each codeword characteristics, then overhead is reduced, but measurement and detection difficulty increases
Solution Approach 1:
The patent uses distinct identifiers or indicators (analogous to color changes) to differentiate between different MCS tables and their associations with specific codewords. Through control signaling, the network entity provides clear indications about which MCS table applies to which codeword, making it easy for the UE to identify and distinguish between different MCS configurations without confusion.
Data Source
AI summary
Methods, systems, and devices for wireless communications at a user equipment (UE) are described. The UE may receive a control message indicating a first (MCS) value and a first resource associated with a first codeword and a second MCS value and a second resource associated with a second codeword. The UE may monitor the first resource for the first codeword in accordance with one or more first parameters determined by indexing a first MCS table using the first MCS value. The UE may monitor the second resource for the second codeword in accordance with one or more second parameters determined by indexing one of the first MCS table using the second MCS value or a second MCS table using the second MCS value. The UE may decode the first codeword and the second codeword based on monitoring the first resource and the second resource.