Wi-Fi Access Point Channel Selection via Station-Assisted Interference Measurement
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Solution Overview
Problem
In wireless communication networks, existing channel selection methods often fail to accurately account for interference from overlapping Basic Service Sets (BSSs), leading to suboptimal bandwidth and resource utilization, especially when there is a mismatch between the interference seen by Access Points (APs) and mobile stations (STAs).
Innovation Solution
The proposed method involves APs and STAs collaborating to perform periodic interference measurements, with STAs assisting APs in determining optimal channel selection by reporting beacon timings and signal strengths, and using these measurements to minimize interference and maximize channel capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If APs perform channel selection based solely on their own interference measurements, then the channel selection process is simple and fast, but the interference assessment is inaccurate due to mismatch between AP and STA interference perspectives
Solution Approach 1:
The patent introduces STAs as intermediaries that perform interference measurements on behalf of APs. STAs measure interference from beacon frames received from other BSSs and report these measurements to their serving AP. This intermediary approach allows the AP to obtain accurate interference assessments from the STA's perspective without the AP directly performing complex measurements, thus resolving the contradiction between measurement accuracy and system complexity.
Solution Approach 2:
The patent implements preliminary interference measurements by STAs before the AP makes channel selection decisions. STAs continuously monitor and measure interference levels from other BSSs and pre-process this information. When the AP needs to make a channel selection, it already has pre-collected interference data from multiple STAs, enabling faster and more accurate decision-making without requiring complex real-time measurements at the AP.
2Measurement precision
If STAs continuously report interference measurements to APs, then channel selection accuracy improves, but network overhead and energy consumption increase
Solution Approach 1:
The patent implements periodic interference measurement and reporting by STAs instead of continuous reporting. STAs perform interference measurements at predetermined intervals and report results to their serving APs at these periodic intervals. This periodic approach maintains adequate measurement accuracy for channel selection while significantly reducing the energy consumption and network overhead associated with continuous measurement and reporting, thus resolving the contradiction between measurement precision and energy loss.
3Productivity
If APs select channels based on limited STA feedback, then the channel selection process is fast and efficient, but the interference assessment may be incomplete or inaccurate
Solution Approach 1:
The patent merges interference measurements from multiple STAs to create a comprehensive interference assessment for the AP. Multiple STAs within the same BSS measure interference from different spatial perspectives and combine their measurements. This merging of measurements from multiple sources provides a more complete and accurate picture of the interference environment, enabling the AP to make better channel selection decisions without significantly increasing processing time, thus resolving the contradiction between productivity and measurement precision.
Data Source
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AI summary
Methods and apparatus are provided for receiver measurement assisted access point control. A method operable by a Wi-Fi network entity includes signaling at least one trigger indication to at least one station served by the Wi-Fi network entity for interference measurements. The method includes receiving interference measurements taken based on the at least one trigger indication from the at least one station. The method includes tuning transmitter parameters based on the received interference measurements.