Wireless LAN Channel Selection Using Collision Probability Records
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Solution Overview
Problem
Current wireless communication systems face delays and congestion due to collisions with regulatory radars in dynamic frequency selection channels, which are required to avoid interference, and discarding these channels reduces available 5GHz LAN channels, leading to further congestion and performance issues.
Innovation Solution
A wireless communication system with group management capabilities that creates collision and usage time records to prioritize existing dynamic frequency selection channels, automatically selecting master access points and LAN channels, and skipping channel availability checks to reduce delays and congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the wireless communication system uses dynamic frequency selection channels in the 5GHz band, then the available channel capacity increases and congestion is reduced, but the system experiences delays and interruptions due to collisions with regulatory radars
Solution Approach 1:
The system performs preliminary actions by creating collision records and usage time records before channel selection, identifying channels with low collision probability in advance. This allows the system to pre-select safe channels and avoid the 30-minute wait that would occur after a collision, thereby reducing delay while maintaining access to DFS channels.
Solution Approach 2:
The system implements feedback mechanisms by continuously monitoring channel usage, creating collision records, and calculating collision probabilities based on historical data. This feedback loop enables the system to learn from past collisions and make informed channel selection decisions, balancing channel availability with collision avoidance.
2Reliability
If the wireless communication system performs channel availability checks before using dynamic frequency selection channels, then channel selection reliability improves, but connection speed and user experience deteriorate due to additional delay
Solution Approach 1:
The system applies partial action by performing channel availability checks selectively rather than for all channels. By using collision probability calculations to identify low-risk channels first, the system performs minimal necessary checks, achieving sufficient reliability without the full overhead of traditional channel availability checks for every channel.
Solution Approach 2:
The system performs preliminary channel assessment using collision probability calculations before executing full channel availability checks. This preliminary filtering reduces the number of channels requiring exhaustive checks, thereby maintaining reliability while improving connection speed.
3Stability of the object's composition
If the wireless communication system discards dynamic frequency selection channels to avoid collisions with regulatory radars, then connection stability improves, but the number of available 5GHz channels decreases leading to increased congestion
Solution Approach 1:
The system changes the parameter of channel selection from binary (safe/unsafe) to probabilistic (collision probability). By calculating and comparing collision probabilities across multiple DFS channels, the system identifies channels with acceptably low collision risk, maintaining connection stability while preserving access to a larger pool of 5GHz channels.
Solution Approach 2:
The system implements dynamic channel selection that adapts to changing conditions. By continuously updating collision records and recalculating probabilities, the system can dynamically adjust which DFS channels are available, maintaining stability while maximizing channel utilization based on current conditions.
Data Source
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AI summary
A wireless communication system using wireless LAN channels for wireless communication is disclosed, comprising: master access point, slave access points, and computing unit. First, the master access point creates a collision record table and a usage time record table. After that, the master access point updates the collision record table and usage time record table based on the usage information, and transmits the collision record table and usage time record table to the slave access points. The computing unit generates the channel collision probability through the number of collisions, and calculates the usage weight of the dynamic frequency selection channel through the channel collision probability. Finally, the wireless communication system automatically selects the wireless LAN channels of the master access point and the slave access points according to the usage weight and usage time record table. As such, the wireless communication system has high efficiency and low delay.