Dual Radio Network Device Adjacent Channel Interference Mitigation
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Solution Overview
Problem
Dual radio network devices operating in the 5 GHz frequency band face adjacent channel interference (ACI) issues, which degrade throughput performance by increasing packet error rates and reducing modulation and coding schemes for downlink traffic.
Innovation Solution
A dual radio network device determines when client devices are within a steering threshold and steers them to communicate through a single radio, avoiding simultaneous uplink and downlink traffic to mitigate ACI, thereby ensuring effective communication while minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dual radio network devices operate simultaneously in the 5 GHz frequency band with one radio transmitting downlink traffic and another receiving uplink traffic, then throughput capacity and client service capability are improved, but adjacent channel interference occurs which degrades packet error rate and reduces modulation and coding schemes
Solution Approach 1:
The patent combines multiple client devices onto a single radio when they would otherwise cause ACI. Specifically, when a first client device is associated with a first radio and a second client device is associated with a second radio, the system steers the second client device to the first radio, merging their communications onto one radio to eliminate the ACI caused by simultaneous uplink and downlink operations on different radios.
Solution Approach 2:
Instead of allowing each client device to communicate through its own assigned radio (the conventional approach), the patent inverts this by steering client devices to share a common radio. This reversal of the assignment strategy eliminates the interference problem by ensuring both uplink and downlink traffic pass through the same radio, preventing ACI between simultaneously operating radios.
2Object-affected harmful factors
If dual radio network devices steer client devices to communicate through a single radio to avoid simultaneous uplink and downlink traffic, then adjacent channel interference is mitigated, but device complexity and control mechanisms increase
Solution Approach 1:
The patent implements a feedback mechanism where the network device continuously monitors client device associations and communication patterns. When ACI conditions are detected (simultaneous uplink and downlink traffic on different radios), the system provides feedback by steering client devices to appropriate radios. This feedback loop enables dynamic adaptation to prevent ACI while maintaining operational simplicity through automated decision-making.
3Adaptability or versatility
If dual radio network devices operate with independent radio assignments for different client devices, then client service capability and network coverage are improved, but packet error rate increases due to adjacent channel interference
Solution Approach 1:
The patent introduces dynamic radio assignment where client device associations are not fixed but can be adjusted in real-time. The system dynamically steers client devices between radios based on current communication conditions, particularly preventing simultaneous uplink and downlink operations that cause ACI. This dynamic adaptation maintains high client service capability while improving reliability by eliminating interference-induced packet errors.
Data Source
AI summary
Examples described herein mitigate adjacent channel interference for dual radios of a network device. Examples described herein may associate, by a network device, a first client device with a first radio of the network device, associate, by the network device, a second client device with a second radio of the network device, determine that the first and second client devices are within a steering threshold, and based on the determination that the first and second client devices are within the steering threshold, steer, by the network device, the second client device from the second radio to the first radio. Examples described herein may communicate, using the first radio of the network device, with the first and second client devices.