Channel Bandwidth Selection for Overlapping BSS Priority
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Solution Overview
Problem
In densely-deployed WLAN scenarios, existing methods fail to ensure each Basic Service Set (BSS) can use a large channel bandwidth effectively due to conflicting service requirements, leading to inefficient network capacity utilization.
Innovation Solution
A method where an access point (AP) in one BSS determines its channel bandwidth based on the priority of overlapping BSSs, adjusting its bandwidth if interference exceeds a threshold by reducing its own bandwidth, instructing adjacent APs to do the same, or selecting non-overlapping channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If each BSS directly determines large channel bandwidth according to service requirements, then network capacity is improved, but interference between overlapping BSSs increases and cannot be ensured that each BSS can use channel of large bandwidth separately
Solution Approach 1:
The patent applies local quality by allowing different BSSs to have different channel bandwidth allocations based on their individual priorities and service requirements. High-priority BSSs can occupy larger bandwidths while low-priority BSSs use smaller bandwidths, creating localized quality differences that resolve the contradiction between maximizing network capacity and reducing interference.
Solution Approach 2:
The patent changes the parameter of channel bandwidth dynamically based on BSS priority levels. By adjusting bandwidth as a variable parameter rather than a fixed value, the system can optimize network capacity for high-priority BSSs while limiting bandwidth for low-priority BSSs to reduce interference, thus resolving the technical contradiction.
2Reliability
If channel bandwidth of first BSS is increased to meet service requirements, then service quality of first BSS is improved, but interference with second BSS increases
Solution Approach 1:
The patent ensures that each BSS receives appropriate service quality by allocating channel bandwidth according to its priority level. High-priority BSSs obtain larger bandwidths for better service quality, while low-priority BSSs receive smaller bandwidths, creating localized quality adjustments that prevent excessive interference with adjacent BSSs.
Solution Approach 2:
The patent introduces asymmetry in bandwidth allocation where different BSSs receive different channel bandwidths based on their priorities. This asymmetric treatment allows the system to favor high-priority BSSs with larger bandwidths while constraining low-priority BSSs, thereby improving service quality for important BSSs without causing excessive interference to others.
3Area of stationary object
If multiple BSSs use overlapping channels with large bandwidths, then network coverage is improved, but channel resource contention increases
Solution Approach 1:
The patent dynamically changes channel bandwidth parameters based on BSS priority and overlap conditions. When BSSs overlap, the system adjusts bandwidth allocation to ensure high-priority BSSs maintain adequate coverage while low-priority BSSs reduce their bandwidth usage, thus managing channel resource contention while preserving necessary coverage area.
Solution Approach 2:
The patent makes channel bandwidth allocation dynamic rather than static, allowing BSSs to adjust their bandwidth usage based on real-time priority assessments and overlap detection. This dynamic approach enables the system to maintain coverage area for high-priority BSSs while automatically reducing resource contention by limiting bandwidth for low-priority BSSs in overlapping regions.
Data Source
Figure 1A~1B
Figure 2~5A
Figure 5B~7
AI summary
Embodiments of the present invention provide a method and a device for selecting a channel bandwidth. The method includes: acquiring a priority of a second BSS of which a coverage area overlaps with a coverage area of a first BSS, and a channel bandwidth of the second BSS; if a priority of the first BSS is higher than or equal to the priority of the second BSS, determining a channel bandwidth that is greater than or equal to the channel bandwidth of the second BSS as the channel bandwidth of the first BSS, and if the priority of the first BSS is lower than the priority of the second BSS, determining a channel bandwidth that is less than the channel bandwidth of the second BSS as the channel bandwidth of the first BSS. Technical solutions of the present invention determine channel bandwidths between BSSs based on priorities of the BSSs, and thus a BSS with a high priority may be guaranteed preferential occupancy of a large bandwidth, and reasonable allocation of the channel bandwidths of the BSSs is achieved.