Wi-Fi Preamble Puncturing Based on Channel Quality Scores
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Solution Overview
Problem
Traditional preamble puncturing schemes in Wi-Fi networks do not effectively determine when to enable puncturing and often select improper puncturing patterns, leading to inefficient channel access and additional costs due to unnecessary bandwidth reduction or resource wastage, especially in low channel utilization or overlapping basic service sets (BSS) scenarios.
Innovation Solution
A method is proposed to determine whether preamble puncturing is needed based on specific conditions, such as channel utilization and neighbor AP activity, and to select a suitable puncturing pattern by calculating scores based on channel qualities, thereby optimizing bandwidth usage and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If preamble puncturing is enabled in traditional schemes, then channel bandwidth is reduced to avoid interference, but channel access efficiency deteriorates due to unnecessary bandwidth reduction in low utilization scenarios
Solution Approach 1:
The patent implements dynamic puncturing pattern selection based on real-time channel conditions. The AP determines channel utilization and neighbor AP activity, then selects puncturing patterns adaptively rather than using fixed patterns. This allows the system to enable puncturing only when necessary (high utilization/interference) and disable it when unnecessary (low utilization), resolving the contradiction between interference avoidance and channel access efficiency.
Solution Approach 2:
The patent changes the parameter of puncturing pattern selection from static to dynamic based on channel conditions. By monitoring channel utilization and neighbor AP activity, the system adjusts the puncturing pattern parameter to match current network conditions, ensuring optimal performance across different scenarios.
2Ease of manufacture
If fixed puncturing patterns are used, then implementation is simplified, but channel resource utilization deteriorates due to improper pattern selection
Solution Approach 1:
The patent transitions from static fixed patterns to dynamic pattern selection based on channel conditions. The system evaluates channel utilization and neighbor AP activity to determine the most appropriate puncturing pattern, maximizing channel resource utilization while maintaining implementation feasibility through standardized selection criteria.
Solution Approach 2:
The patent applies different puncturing patterns to different channel conditions locally. Instead of using a single fixed pattern for all scenarios, the system selects specific patterns based on local channel characteristics (utilization level, neighbor activity), ensuring optimal resource utilization for each specific condition.
3Quantity of substance
If bandwidth is enlarged to 320 MHz, then channel availability increases, but adjacent band interference increases due to limited channel band resources in different regions
Solution Approach 1:
The patent segments the 320 MHz bandwidth into multiple 20 MHz sub-channels and applies puncturing selectively to specific sub-channels based on interference conditions. This allows the system to maintain the overall 320 MHz bandwidth capability while puncturing only the affected adjacent bands, thus preserving channel availability while reducing interference.
Solution Approach 2:
The patent applies puncturing locally to specific sub-channels within the 320 MHz bandwidth rather than uniformly across the entire bandwidth. By identifying which sub-channels are affected by adjacent band interference and applying puncturing only to those specific portions, the system maintains high channel availability in unaffected sub-channels while mitigating interference in affected sub-channels.
Data Source
AI summary
In embodiments of the present disclosure, there is provided an approach for selecting a channel puncturing scheme based on channel qualities. A method comprises detecting channel interference between neighbor access points (APs), and determining whether a preamble puncturing needs to be enabled based on some puncturing conditions. After determining that a preamble puncturing needs to be enabled, scores for candidate puncturing patterns are calculated based on channel qualities of the sub-channels in the channel, and a proper puncturing pattern can be selected based on the respective scores. Embodiments of the present disclosure can help AP to achieve an effective and better puncturing scheme in real deployment.