Unequal Modulation Coding Scheme Allocation for Wireless Throughput
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Solution Overview
Problem
Existing wireless communication systems face challenges in achieving high throughput due to SNR imbalances between primary and secondary channels, particularly when using the same Modulation and Coding Scheme (MCS) across entire Resource Units (RUs) or Multiple Resource Units (MRUs).
Innovation Solution
The implementation of an Unequal Modulation and Coding Scheme (UEM) allocation scheme, which assigns different MCSs to various segments of an RU/MRU based on their specific Signal-to-Noise Ratio (SNR) conditions, thereby optimizing data transmission across spatial streams and frequency sub-blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the same MCS is used across entire RUs or MRUs, then device complexity is reduced and ease of operation is improved, but throughput is limited due to SNR imbalances between primary and secondary channels
Solution Approach 1:
The patent divides the RU/MRU into multiple segments (primary channel segments and secondary channel segments) and assigns different MCS indices to different segments based on their SNR conditions. This segmentation allows each segment to be optimized independently, resolving the contradiction by enabling higher throughput through adaptive MCS allocation while maintaining manageable complexity through systematic segment-based management.
Solution Approach 2:
The patent applies local quality by assigning different MCS characteristics to different spatial streams and frequency sub-blocks based on their specific SNR conditions. Each segment receives a locally optimized MCS index rather than a uniform allocation, allowing the system to achieve higher overall throughput by matching modulation and coding schemes to local channel conditions.
2Productivity
If different MCSs are assigned to various segments of RU/MRU based on SNR conditions, then throughput is enhanced by adapting to local channel conditions, but device complexity increases due to the need for segment-based MCS management
Solution Approach 1:
The patent implements segmentation by dividing RUs/MRUs into distinct segments (primary and secondary channel segments) with specific spatial streams and frequency sub-blocks. This segmentation structure simplifies the management of different MCS allocations by providing a systematic framework for assigning MCS indices to specific segments based on their SNR conditions, thereby enhancing throughput while keeping operation manageable.
Solution Approach 2:
The patent applies dynamics by enabling flexible and adaptive MCS index assignment to different segments based on varying SNR conditions. The system can dynamically adjust which MCS index is assigned to which segment, allowing optimal adaptation to changing channel conditions while maintaining structured management through the segment-based approach.
3Reliability
If uniform MCS is applied across all spatial streams and frequency sub-blocks, then ease of operation is maintained, but SNR imbalances between primary and secondary channels cannot be mitigated
Solution Approach 1:
The patent applies local quality by assigning different MCS indices to different spatial streams and frequency sub-blocks based on their specific SNR conditions. This local optimization ensures that each segment operates at its optimal performance level, mitigating SNR imbalances between primary and secondary channels while improving overall communication efficiency through targeted MCS allocation.
Data Source
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AI summary
For example, a transmitter may be configured to assign a stream of encoded data bits of a Physical layer (PHY) Protocol Data Unit (PPDU) to one or more sequences of encoded bit blocks for one or more spatial streams based on an Unequal Modulation and Coding Scheme (MCS) (UEM) assignment including an assignment of a plurality of MCSs to a plurality of frequency sub-blocks for the one or more spatial streams. For example, the transmitter may be configured to assign the one or more sequences of encoded bit blocks to the plurality of frequency sub-blocks for the one or more spatial streams.