Wi-Fi 7 MLO Multicast Steering for Channel Congestion Relief
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Solution Overview
Problem
Multicast traffic in Wi-Fi 7 networks using Multi-Link Operation (MLO) causes network disruptions and performance degradation due to increased channel congestion and interference across multiple frequency bands.
Innovation Solution
A system and method for managing multicast traffic by generating a global link utilization table and steering multicast traffic to less congested links using Wi-Fi 7 access points and stations, leveraging MLO to balance load and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multicast traffic is transmitted over multiple links with MLO, then data aggregation and throughput are improved, but channel congestion and interference increase causing network disruptions
Solution Approach 1:
The patent applies local quality by differentiating traffic handling across different links. The AP monitors channel utilization per link and applies different transmission strategies - unicast traffic continues on the original link while multicast traffic is redirected to links with lower utilization. This localized adaptation resolves the contradiction by maintaining high throughput on less congested links while avoiding the harmful effects of congestion on already busy links.
Solution Approach 2:
The patent implements dynamics through continuous monitoring of channel utilization and dynamic redirection of multicast traffic. The system doesn't statically assign multicast traffic to specific links but rather dynamically adjusts the distribution based on real-time channel conditions. This dynamic approach allows the network to adapt to changing congestion patterns, maintaining high throughput while minimizing the harmful effects of congestion.
2Productivity
If multicast traffic is transmitted over multiple links with MLO, then data aggregation and throughput are improved, but network disruptions and performance degradation occur
Solution Approach 1:
The patent applies local quality by differentiating traffic handling across different links. The AP monitors channel utilization per link and applies different transmission strategies - unicast traffic continues on the original link while multicast traffic is redirected to links with lower utilization. This localized adaptation resolves the contradiction by maintaining high throughput on less congested links while avoiding the harmful effects of congestion on already busy links.
Solution Approach 2:
The patent implements dynamics through continuous monitoring of channel utilization and dynamic redirection of multicast traffic. The system doesn't statically assign multicast traffic to specific links but rather dynamically adjusts the distribution based on real-time channel conditions. This dynamic approach allows the network to adapt to changing congestion patterns, maintaining high throughput while minimizing the harmful effects of congestion.
3Productivity
If channel utilization threshold is exceeded on a link with multicast traffic, then load balancing is needed, but traffic steering complexity increases
Solution Approach 1:
The patent applies self-service by implementing automatic threshold-based triggering. When channel utilization exceeds a predefined threshold on any link, the system automatically initiates multicast traffic steering without requiring manual intervention or complex control logic. The AP itself performs the monitoring and redirection, reducing the need for external controller complexity while achieving effective load balancing.
Solution Approach 2:
The patent uses parameter changes by monitoring channel utilization as a key parameter and triggering traffic steering actions when this parameter exceeds a threshold. The system changes the traffic distribution parameter dynamically based on the utilization metric, providing a simple yet effective mechanism for load balancing that doesn't require complex steering logic.
Data Source
AI summary
A Wi-Fi controller receives AP scan reports and station scan reports from a plurality of Wi-Fi 7 access points servicing a plurality of stations for wireless access to the data communication network. Each Wi-Fi 7 access point has multiple links being monitored across 2.4 GHz, 5 GHz and 6 GHz. A global link utilization table of station versus channel utilization is generated from the access point reports and station scan reports. A threshold of channel utilization on the first link of the first Wi-Fi 7 access point being exceeded is detected, while also detecting multicast traffic on the first link and detecting that the first Wi-Fi 7 station is Wi-Fi 7 capable. Responsive to the detections, multicast traffic is steered from the to the first link (e.g., higher frequency band and/or higher channel bandwidth) to the second link (e.g., lower frequency band and/or lower channel bandwidth), including steering multicast traffic from a second application on the first Wi-Fi 7 station to the second link.