Link Configuration Specific Modulation and Coding Scheme
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication technologies, such as 5G NR and LTE, face challenges in optimizing modulation and coding schemes (MCS) across varying link configurations, leading to suboptimal spectral efficiency as carrier frequencies and numerology change, as existing methods are often oblivious to these configurations.
Innovation Solution
Implementing a link configuration-specific MCS approach, where MCS indices are mapped to specific parameters based on configurations like carrier frequency, numerology, and waveform type, using separate tables or baseline tables to ensure monotonically increasing spectral efficiency with higher MCS indices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a universal MCS mapping is used across all link configurations, then device complexity is reduced and ease of operation is improved, but spectral efficiency deteriorates because the mapping does not account for variations in carrier frequency and numerology
Solution Approach 1:
The patent segments the universal MCS mapping into multiple configuration-specific mappings, where each mapping is tailored to specific link configurations (e.g., carrier frequency ranges, numerology values). This segmentation allows the system to select the appropriate mapping based on current link conditions, thereby improving spectral efficiency without requiring a single complex universal mapping that would need to accommodate all possible configurations.
Solution Approach 2:
The patent establishes MCS parameter mappings in advance for different link configurations before actual communication occurs. These pre-configured mappings are stored and readily available for selection based on detected link conditions. This preliminary action eliminates the need for real-time complex calculations and reduces device complexity during operation, while still achieving configuration-optimized spectral efficiency.
2Productivity
If MCS parameters are adjusted dynamically according to link configuration, then spectral efficiency is improved, but the complexity of MCS management and mapping increases
Solution Approach 1:
The patent implements dynamic MCS parameter adjustment by maintaining multiple pre-configured mappings and selecting the appropriate one based on current link configuration parameters such as carrier frequency and numerology. This dynamic selection process allows the system to adapt to varying link conditions and optimize spectral efficiency without requiring complex real-time calculations, as the heavy lifting of determining optimal parameters is done in advance during configuration setup.
Solution Approach 2:
The patent changes the mapping parameters themselves based on link configuration characteristics. Different mappings are defined with different MCS index to spectral efficiency relationships, tailored to specific carrier frequency ranges and numerology values. By changing the mapping parameters according to link configuration, the system achieves optimized spectral efficiency across diverse conditions while keeping the underlying mechanism relatively simple.
3Productivity
If separate MCS tables are used for different link configurations, then spectral efficiency is optimized for each configuration, but the overall system complexity and memory requirements increase
Solution Approach 1:
The patent creates MCS mappings that serve multiple configurations through a unified structure. Rather than maintaining entirely separate tables for each configuration, the mappings are designed to be applicable across multiple link configurations, with each mapping covering a range of configurations. This multi-functional approach reduces the total number of mappings needed while still providing configuration-specific optimization, thereby reducing memory requirements compared to fully separate tables.
Solution Approach 2:
The patent merges multiple configuration-specific mappings into a unified selection framework. Instead of treating each configuration as requiring a completely independent table, the patent combines them into a single system where the appropriate mapping is selected based on link configuration parameters. This merging reduces redundancy and optimizes memory usage while maintaining the benefits of configuration-specific optimization.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for link configuration-specific modulation and coding scheme (MCS). A method that may be performed by a user equipment (UE) includes receiving control information indicating an MCS index corresponding to one or more MCS parameters to be used for a communication link, determining the one or more MCS parameters corresponding to the MCS index, wherein a mapping of the MCS index to the one or more MCS parameters is dependent on a configuration of the communication link, and communicating via the communication link in accordance with the one or more MCS parameters.