Wi-Fi 7 Access Point Puncturing for Primary Channel Overload

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Solution Overview

Problem

Wi-Fi 7 networks face inefficiencies due to excessive management frames on the primary channel, leading to overburdened systems and impacted data transmission.

Innovation Solution

Implement dynamic puncturing of data frames to manage channel transmission bandwidth by activating a puncturing pattern when primary channel usage exceeds a threshold, allowing data frames to be transmitted over the remaining channel bandwidth while continuing management frames on the primary channel.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple access points with multiple BSSIDs use the same primary channel for beaconing and probing, then more clients can be served simultaneously, but channel utilization on the primary channel increases excessively

Engineering Contradiction:

Improvenumber of clients servedVSAvoidchannel utilization on primary channel

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The channel bandwidth is segmented into primary channel portion and remaining channel portion. Management frames are confined to the primary channel portion, while data frames can utilize the remaining channel portion. This segmentation allows multiple BSSIDs to coexist on the same primary channel without excessive contention for management frames, as data traffic is separated into the remaining portion.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Data frame transmissions are extracted from the primary channel and moved to the remaining channel portion. This extraction removes data traffic from the primary channel, reducing overall channel utilization and preventing interference between management frames and data frames while allowing multiple BSSIDs to operate simultaneously.

Inventive Principle:

Principle #2Taking out (Extraction)

2Productivity

If the entire channel transmission bandwidth is occupied for all transmissions, then maximum throughput is achieved, but data transmission is impacted when primary channel utilization is high

Engineering Contradiction:

ImprovethroughputVSAvoiddata transmission quality

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The channel is divided into primary channel portion and remaining channel portion with distinct purposes. The primary channel portion handles management frames reliably, while the remaining channel portion handles data frames. This segmentation ensures data transmission reliability by isolating data traffic from management frame contention on the primary channel.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the channel are assigned different qualities/functions. The primary channel portion is optimized for management frames with guaranteed access, while the remaining channel portion is optimized for data transmission. This local quality differentiation ensures that data transmission is not impacted by management frame overhead on the primary channel.

Inventive Principle:

Principle #3Local quality

3Productivity

If management frames and data frames share the same channel bandwidth, then channel efficiency is maximized, but interference between management frames and data frames occurs

Engineering Contradiction:

Improvechannel efficiencyVSAvoidinterference between frame types

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The channel bandwidth is segmented into primary channel portion for management frames and remaining channel portion for data frames. This spatial segmentation in frequency domain prevents interference between management frames and data frames while maintaining overall channel efficiency through coordinated puncturing patterns.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Data frames are extracted from the primary channel and transmitted on the remaining channel portion using puncturing patterns. This extraction eliminates interference between management frames and data frames by separating their transmission domains, while still utilizing the entire channel bandwidth efficiently through dynamic puncturing.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS12376136B2Bandwidth selection in Wi-Fi 7 access points

Publication Date: 2025.07.29 FORTINET INC

AI summary

A threshold usage of the primary channel transmission bandwidth is detected exceeding a predetermined value, triggering a second mode. Responsive to reaching the threshold usage detection, a puncturing pattern is activated to transmit data frames over the remaining channel transmission bandwidth while continuing to transmit management frames over the primary channel transmission bandwidth. Responsive to reaching the threshold usage detection, data packets are separated using RU allocations for multiple wireless clients over the remaining channel transmission bandwidth. Data packets are then transmitted according to bandwidth limitations and spectral limitations.