Composite Channel Bandwidth Determination via Idle Access Control
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Solution Overview
Problem
Wireless local area networks (WLANs) face challenges in efficiently determining available channel bandwidths due to overlapping communication channels, leading to interference and degraded signal quality between different WLANs operating on different frequency bands.
Innovation Solution
A method and system that determine an available channel bandwidth by forming a composite communication channel using component channels and access control channels, where the availability is based on the idle status of access control channels, allowing for efficient channel utilization and reduced interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple WLANs operate on different frequency bands with overlapping channels, then channel bandwidth utilization increases, but interference and signal quality degrade
Solution Approach 1:
The patent segments the frequency spectrum into distinct component channels (e.g., 20 MHz channels) that can be individually assessed for availability. Each component channel is evaluated separately through clear channel assessment (CCA), allowing the system to identify and utilize only the idle segments while avoiding overlapping transmissions that cause interference.
Solution Approach 2:
The patent implements dynamic channel selection where the composite channel configuration is not fixed but adapts in real-time based on current channel availability. The system continuously monitors component channels and dynamically forms composite channels from available idle components, enabling flexible adjustment to changing interference conditions and optimizing both utilization and signal quality.
2Adaptability or versatility
If access control channels partially overlap with component channels, then channel access control becomes more flexible, but determining available bandwidth becomes more complex
Solution Approach 1:
The patent separates the channel determination process into discrete component channel assessments. Each component channel is independently evaluated for idle status, and the results are combined to determine the overall composite channel availability. This segmentation simplifies the complexity by breaking down the overlapping channel determination into manageable, independent decisions.
Solution Approach 2:
The patent performs clear channel assessment (CCA) on component channels before forming composite channels for data transmission. This preliminary action of assessing individual component channel availability beforehand enables the system to make informed decisions about composite channel formation, reducing the complexity of real-time determination during actual data transmission.
Data Source
AI summary
In a method of determining an available channel bandwidth in a communication system, wherein the communication system utilizes i) a set of component channels for transmitting data streams and ii) a set of access control channels, and wherein each of at least some of the access control channels partially overlaps, in frequency, at least one of the component channels, whether a primary channel of the access control channels is idle is determined. The primary channel partially overlaps, in frequency, at least a first one of the component channels. That a composite channel includes one or more of the component channels is determined based at least on a determination of whether the primary channel is idle. A signal is caused to be transmitted via the composite channel after determining that the composite channel includes one or more of the component channels.