AP Channel Switching for Secondary-Channel STA Scheduling

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Solution Overview

Problem

Existing channel switching methods in wireless communication systems fail to efficiently schedule both legacy and new-standard devices to operate on secondary channels, leading to increased load and interference on the primary channel.

Innovation Solution

A channel switching method that allows individual STAs to switch from a primary channel to a secondary channel, enabling flexible operation for both legacy and new-standard devices, without requiring a change in the primary channel of the entire BSS.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If all STAs operate on the primary channel by default, then communication compatibility is maintained, but channel load and interference increase

Engineering Contradiction:

Improvecommunication compatibilityVSAvoidchannel load and interference

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent segments the STA population into different groups based on their standard type (legacy vs. new-standard). Different STAs are assigned to different channels (primary or secondary) according to their capabilities, allowing simultaneous operation on multiple channels without requiring all STAs to use the same channel.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different channel assignment strategies to different STAs based on their local characteristics (device type and capability). Legacy STAs remain on the primary channel while new-standard STAs can operate on secondary channels, optimizing each STA's channel assignment according to its specific requirements.

Inventive Principle:

Principle #3Local quality

2Productivity

If individual STAs are allowed to switch to secondary channels, then channel utilization improves, but scheduling complexity increases

Engineering Contradiction:

Improvechannel utilization rateVSAvoidscheduling complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent implements dynamic channel switching where STAs can transition between primary and secondary channels based on real-time conditions. The AP sends indication information to control STAs dynamically switch channels, allowing the system to adapt to changing traffic patterns and channel conditions while maintaining manageable complexity through standardized switching protocols.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20250365770A1Channel switching method

Publication Date: 2025.11.27 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

Provided are a channel switching method, a wireless device, and a chip. The method is performed by an access point (AP). The method includes transmitting, on a primary channel, a first frame to a first station (STA), wherein the first frame is configured to instruct the first STA to switch from the primary channel to a first secondary channel. The method further includes: transmitting, on the primary channel, a second frame to a second STA, wherein the second frame is configured to instruct the second STA to switch from the primary channel to a second secondary channel. A standard of the first STA is different from or the same as a standard of the second STA.