Wireless LAN Channel Selection Using OBSS Frequency Information
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Solution Overview
Problem
Existing wireless LAN systems struggle to appropriately determine the frequency band of channels used in a Basic Service Set (BSS), leading to interference with Overlapping Basic Service Sets (OBSS) due to fixed channel settings, especially in uplink and downlink communications.
Innovation Solution
A wireless communication apparatus and method that dynamically adjusts the frequency band of channels based on information received from OBSS, allowing for non-overlapping channel settings in both downlink and uplink directions to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a fixed channel frequency band is set at manufacturing time, then the device is simple to operate and manufacture, but channel interference occurs with OBSS in wireless communication
Solution Approach 1:
The patent applies dynamics by enabling the access point to dynamically select and switch between multiple downlink channels based on real-time detection of OBSS channel usage. Instead of a fixed manufacturing setting, the system continuously adapts channel selection to avoid interference with overlapping basic service sets, transforming the channel configuration from static to dynamic operation
Solution Approach 2:
The patent implements parameter changes by modifying the downlink channel frequency band parameter based on detected OBSS channel conditions. The access point changes the operating frequency parameter of the downlink channel to select from alternative channels, thereby adjusting the communication parameter to avoid interference while maintaining operational simplicity
2Object-affected harmful factors
If the downlink channel frequency band is set to avoid OBSS primary channel, then channel interference is reduced, but the system complexity increases due to additional channel management
Solution Approach 1:
The patent applies self-service by enabling the access point to autonomously detect OBSS channel usage and automatically select appropriate downlink channels without external intervention. The system performs self-diagnosis of channel interference conditions and self-adjusts the downlink channel configuration, eliminating the need for complex manual channel management while reducing interference
Solution Approach 2:
The patent implements feedback by having the access point continuously monitor and detect the channel usage status of overlapping basic service sets, then use this feedback information to make informed decisions about downlink channel selection. This closed-loop feedback mechanism allows the system to adapt to changing wireless conditions while maintaining simple operation through automated decision-making
3Productivity
If multiple secondary channels are provided in addition to primary channels, then data transmission delay is reduced and system performance is improved, but channel frequency band determination becomes more difficult
Solution Approach 1:
The patent applies segmentation by dividing the downlink communication into multiple independent channel segments (primary channel and multiple secondary channels). Each channel can be independently selected and managed based on OBSS interference conditions, allowing the system to utilize multiple non-overlapping channels simultaneously to increase throughput while simplifying the determination process for each individual channel segment
Data Source
AI summary
There is provided a wireless communication apparatus serving as an access point of a wireless LAN. The wireless communication apparatus includes a wireless communication unit and a controller. The wireless communication unit receives a signal including information regarding a channel used in an OBSS (Overlap Basic Service Set). The controller determines a frequency band of a channel used in a BSS (Basic Service Set) on the basis of the information regarding the channel used in the OBSS.