MCS Selection Using Change Indicators Beyond Lookup Tables
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Solution Overview
Problem
Existing wireless communication systems are limited by standardized lookup tables that restrict the selection of optimal modulation and coding schemes, particularly in scenarios like cell edges where new techniques require different combinations of modulation order, transport block size, and maximum power reduction, leading to suboptimal performance.
Innovation Solution
Incorporating a change indicator field in the control information transmitted to User Equipment (UE) to dynamically modify the modulation and coding scheme, allowing for flexible selection of optimal values for modulation order, transport block size, and maximum power reduction, even if they are not listed in the standardized lookup tables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If standardized lookup tables are used to determine MCS, then implementation complexity is reduced and compatibility is improved, but adaptability and performance optimization are worsened
Solution Approach 1:
The patent segments the MCS determination process into two parts: a standardized lookup table for basic functionality and a separate change indicator mechanism for adaptive modifications. This allows the system to maintain the simplicity of standardized tables while adding adaptability through incremental changes indicated by specific fields in the control information.
Solution Approach 2:
The patent introduces dynamic adaptability by allowing the MCS to be modified based on change indicators received in control information. The UE can dynamically adjust modulation order, transport block size, or power reduction parameters beyond the fixed lookup table entries, enabling real-time optimization without redesigning the entire system.
2Reliability
If new MCS techniques are implemented, then performance and optimization are improved, but compatibility with existing standardized tables deteriorates
Solution Approach 1:
The patent uses change indicators as intermediaries between the standardized lookup table system and new MCS techniques. These indicators act as a bridge, allowing the UE to apply modifications to lookup table entries or select from extended configurations without requiring complete replacement of existing standardized tables, thus maintaining backward compatibility while enabling performance improvements.
3Productivity
If complete redesign of lookup tables is performed, then optimal MCS selection is improved, but implementation cost and complexity increase
Solution Approach 1:
The patent prepares the UE in advance with standardized lookup tables containing pre-configured MCS parameters. This preliminary setup allows for efficient operation without requiring complete redesign, while the change indicator mechanism provides a ready-made framework for future optimizations without incurring high implementation costs.
Solution Approach 2:
Instead of redesigning the entire lookup table structure, the patent enables optimization through parameter changes indicated by change indicators. These indicators can modify specific parameters such as modulation order, transport block size, or power reduction values, allowing incremental improvements to efficiency without the high cost of complete system redesign.
Data Source
AI summary
Techniques for indicating and/or selecting a modulation and coding scheme (MCS) are disclosed. A method for selecting the MCS may comprise receiving control information, identifying a change indicator, determining a first MCS based on the control information, and modifying the first MCS based on the change indicator to determine a second MCS.