Unequal MCS Assignment in Wi-Fi 7 Spatial Streams
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current Wi-Fi systems, such as Wi-Fi 7, only support a single modulation and coding scheme (MCS) per user, limiting throughput and capacity due to the inability to assign different MCSs to spatial streams with varying channel conditions, which are not adequately managed by existing IEEE standards.
Innovation Solution
The introduction of an unequal modulation and coding scheme (MCS) system that allows multiple MCSs to be assigned to different spatial streams, using a redesigned user-specific field structure with a new Unequal MCS (UEM) user field, enabling users to adapt to varying channel conditions and data requirements by dividing the user-specific field into areas for unequal MCS users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single MCS is assigned to each user in current Wi-Fi systems, then the system structure remains simple and compatible with existing standards, but the throughput and network capacity are limited due to inability to adapt to varying channel conditions across spatial streams
Solution Approach 1:
The patent segments the MCS assignment by introducing separate MCS fields for different spatial streams within the same user field. Specifically, the user field is divided to include first MCS information for first spatial streams and second MCS information for second spatial streams, allowing independent MCS selection for each spatial stream while maintaining the overall user field structure
Solution Approach 2:
The patent adds a new dimension to MCS assignment by introducing spatial stream differentiation within the MCS configuration. Instead of a single MCS per user, the system now assigns MCSs across multiple dimensions (different spatial streams), enabling unequal MCS assignment that adapts to varying channel conditions while extending existing Wi-Fi 7 capabilities
2Productivity
If unequal MCSs are assigned to different spatial streams, then throughput and network capacity are enhanced by adapting to varying channel conditions, but the user-specific field structure becomes more complex requiring redesign
Solution Approach 1:
The user-specific field is segmented into multiple components: a first portion containing first MCS information for first spatial streams, and a second portion containing second MCS information for second spatial streams. This segmentation allows the field to accommodate multiple MCSs while maintaining a structured, manageable format that can be systematically processed
Solution Approach 2:
The redesigned user-specific field structure serves multiple functions: it identifies users, assigns MCSs for different spatial streams, and maintains compatibility with existing Wi-Fi 7 mechanisms while enabling unequal MCS assignment. The field structure is designed to be universally applicable across different user scenarios and spatial stream configurations
3Reliability
If multiple MCSs are assigned to a single user across different spatial streams, then adaptation to varying channel conditions improves reliability, but existing IEEE standard compatibility is compromised
Solution Approach 1:
The patent applies local quality by allowing different MCSs for different spatial streams within the same user field. Each spatial stream can have its own MCS optimized for its specific channel conditions, while the overall user field structure maintains a consistent format that can be processed by standard-compliant devices
Solution Approach 2:
The system introduces dynamic MCS assignment where MCS selection is no longer fixed per user but can vary across different spatial streams based on real-time channel conditions. This dynamic approach allows the system to adapt to changing conditions while maintaining backward compatibility through structured field redesign
Data Source
AI summary
This disclosure describes systems, methods, and devices related to unequal modulation and coding scheme (unequal MCS). A device may decode user fields or first portions of unequal modulation and coding scheme (UEM) user fields from a first user specific field. The device may determine resource allocations, resource unit (RU) and multiple resource unit (MRU) allocations, based on the order of decoded user fields or the first portions of UEM user fields. The device may identify whether a user is a UEM user based on an indication in a first portion of a UEM user field or a new designed subfield, MCS type subfield, in a first user specific field. The device may decode a second user specific field to retrieve remaining portions of UEM user fields for UEM users to obtain the full set of MCSs.