Dual Interface Wi-Fi Controller Load Balancing
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Solution Overview
Problem
Dual-band client devices in Wi-Fi networks often connect to the more crowded 2.4 GHz band instead of the less crowded 5 GHz band, leading to poor performance due to interference from Bluetooth and other 2.4 GHz devices, especially in environments like vehicles or buildings.
Innovation Solution
A wireless access point with dual AGOs for 2.4 GHz and 5 GHz bands steers dual-band client devices to connect via the 5 GHz interface by ignoring probe requests in the 2.4 GHz band, ensuring they connect using the 5 GHz band, thereby reducing interference and improving performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dual-band client devices connect to the 2.4 GHz band, then compatibility with more devices is improved, but interference from Bluetooth and other 2.4 GHz devices increases
Solution Approach 1:
The patent segments the wireless network into two separate access points: a 2.4 GHz AGO (Autonomous Group Owner) and a 5 GHz AGO. This segmentation allows devices to be distributed across different frequency bands, with 2.4 GHz devices connecting to the 2.4 GHz AGO and 5 GHz capable devices connecting to the 5 GHz AGO, thereby reducing interference while maintaining compatibility.
Solution Approach 2:
The patent introduces an intermediary mechanism (the dual-AGO access point system) that mediates between devices needing 2.4 GHz compatibility and those that can use 5 GHz. The system automatically directs dual-band devices to the 5 GHz band while maintaining a 2.4 GHz AGO for single-band devices, acting as a mediator that resolves the conflict between compatibility and interference reduction.
2Object-affected harmful factors
If dual-band client devices connect to the 5 GHz band, then interference is reduced, but compatibility with single-band 2.4 GHz devices is limited
Solution Approach 1:
The patent creates two separate service segments: a 5 GHz AGO for low-interference connections and a 2.4 GHz AGO for maximum compatibility. This segmentation ensures that 5 GHz capable devices benefit from reduced interference while single-band 2.4 GHz devices remain fully compatible by connecting to the 2.4 GHz AGO.
Solution Approach 2:
The access point system performs multiple functions simultaneously by maintaining both a 2.4 GHz AGO and a 5 GHz AGO. This multi-functionality allows the system to serve both dual-band devices (which can connect to either band) and single-band 2.4 GHz devices (which must connect to 2.4 GHz), achieving universality across different device types.
3Productivity
If dual-band devices are forced to connect via 5 GHz band, then data rate is improved, but connection establishment complexity increases
Solution Approach 1:
The patent implements a self-service mechanism where dual-band client devices automatically detect and connect to the 5 GHz AGO without requiring manual configuration or complex establishment procedures. The 5 GHz AGO broadcasts its presence and devices autonomously establish connections, simplifying the process while achieving high data rates.
Solution Approach 2:
The system performs preliminary action by having the 5 GHz AGO actively broadcast its availability and capabilities before devices attempt to connect. This preliminary signaling simplifies the connection establishment process by providing devices with clear information about the preferred 5 GHz connection option in advance.
Data Source
AI summary
A method includes receiving at a wireless access point a first probe request from a first client device requesting connection with the wireless access point via a first frequency band, queueing the first client device in response to an indication that the first client device supports connection via the second frequency band, and in response to receiving at the wireless access point a second probe request from the first client device requesting connection with the wireless access point via the second frequency band, establishing a connection between the wireless access point and the first client device using the second frequency band.