Dynamic Channel Allocation in Wireless Local Area Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing use of wireless local area networks (WLANs) leads to interference issues between adjacent basic service sets (BSSs) due to overlapping channels, which deteriorates network performance and makes it challenging to allocate non-overlapping channels, especially in densely populated areas with a high number of access points.
Innovation Solution
A method is introduced to minimize interference between adjacent BSSs by detecting adjacent access points, requesting and receiving resource allocation information, and reallocating channels based on interference measurements, using frames such as probe request and response frames, resource allocation request and response frames, and inter BSS measurement request and response frames to determine optimal channel configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If access points use overlapping channels to increase network coverage, then network coverage area is improved, but interference between adjacent BSSs increases and network performance deteriorates
Solution Approach 1:
The patent implements dynamic channel allocation where access points can switch between different channels based on real-time interference conditions. The system transitions from static channel assignment to dynamic adaptation, allowing BSSs to change their operating channels to minimize interference while maintaining coverage area.
Solution Approach 2:
The patent changes the channel parameter dynamically based on interference measurements. By monitoring interference levels and adjusting the channel parameter accordingly, the system optimizes network performance while maintaining adequate coverage area.
2Object-affected harmful factors
If non-overlapping channels are allocated to adjacent BSSs to reduce interference, then interference between BSSs is reduced, but the number of available channels becomes insufficient in densely populated areas
Solution Approach 1:
The patent performs preliminary interference measurements and channel assessments before finalizing channel allocation. By proactively identifying suitable channels and predicting interference patterns, the system can allocate channels more effectively in densely populated areas without causing excessive interference.
Solution Approach 2:
The patent implements a feedback mechanism where interference measurements are continuously monitored and used to adjust channel allocations. This closed-loop system allows the network to adapt to changing conditions and optimize channel usage based on actual interference levels observed in real-time.
3Reliability
If channel reallocation is performed frequently to optimize performance, then network performance is improved, but system complexity and overhead increase
Solution Approach 1:
The patent implements periodic channel measurements and evaluations at predetermined intervals rather than continuous monitoring. This periodic approach reduces system complexity and overhead while still capturing significant changes in interference conditions that would warrant channel reallocation.
Solution Approach 2:
The patent enables access points to autonomously perform interference measurements and make channel selection decisions based on pre-established criteria. This self-service approach reduces the need for complex centralized control while maintaining optimized performance through distributed intelligence.
Data Source
AI summary
A method and system for managing a channel in a wireless local area network is disclosed. The method includes detecting adjacent access points, transmitting a resource allocation request frame including candidate channel information which the first access points wants to a master access point among the detected adjacent access points, receiving a resource allocation response frame which is a response with respect to the resource allocation request frame from the master access point, and configuring the BSS based on channel related information included in the resource allocation response frame. Accordingly, performance of the wireless local area network can be improved.