Wi-Fi 7 RU Tone Allocation for Mixed Frame Sizes

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Solution Overview

Problem

Wi-Fi 7 lacks a robust technique for allocating combinations of RU tone sizes based on frame sizes of network traffic, leading to inefficient network performance.

Innovation Solution

Determine a combination of small and large RU tones based on the frame size of data packets and allocate them to Wi-Fi 7 stations for efficient data transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple RU tones are allocated to stations in Wi-Fi 7, then spectral efficiency is improved, but lack of robust allocation technique for combinations of RU tone sizes based on frame sizes reduces network performance

Engineering Contradiction:
Improvespectral efficiencyVSAvoidnetwork performance
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The patent applies parameter changes by dynamically adjusting RU tone allocation sizes based on frame size parameters. The access point determines appropriate RU tone combinations (e.g., 26 tones, 52 tones, 106 tones) according to the size of data packets being transmitted, optimizing both spectral efficiency and network performance through parameter-based adaptation

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent implements dynamics by making RU tone allocation flexible and adaptive rather than static. The system dynamically selects and allocates different combinations of RU tones based on real-time frame size requirements, allowing the network to adapt to varying traffic conditions and maintain optimal performance

Inventive Principle:
Principle #15Dynamics

2Device complexity

If entire channel is allocated to one client at a time in Wi-Fi 5, then simplicity of allocation is maintained, but network efficiency and spectral use deteriorate

Engineering Contradiction:
Improveallocation complexityVSAvoidnetwork efficiency
Core Design Contradiction:
Device complexityVSProductivity

Solution Approach 1:

The patent applies segmentation by dividing the channel into multiple RU tones of different sizes that can be allocated to multiple clients simultaneously. Instead of allocating the entire channel to one client, the system segments the spectrum into smaller RU units (e.g., 26, 52, 106, 242 tones) that can be distributed among multiple stations, improving network efficiency while maintaining manageable allocation complexity

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent implements universality by creating a multi-functional RU allocation system that can handle different frame sizes and traffic types using the same basic RU tone structure. The standardized RU allocation mechanism works universally across different client requirements, supporting both small and large data packets through appropriate RU tone combinations

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS12532339B2Allocation of multi resource units to Wi-Fi stations
Publication Date: 2026.01.20 FORTINET INC
  • US12532339B2 patent drawing
  • US12532339B2 patent drawing
  • US12532339B2 patent drawing

AI summary

A size of a data packet being transmitted downlink to a specific Wi-Fi 7 client is determined from real-time data traffic. A number of small tones and large tones needed in combination for the data packet transmission, either alone or in combination, is calculated. The combination of small RU tones and large RU tones is allocated to the specific wireless client for use in downlink. The data packet is transmitted downlink to the Wi-Fi 7 client across the combination of small and large RU tones.