WLAN Channel Selection via Continuous Performance Ranking
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Solution Overview
Problem
Existing wireless communication networks face challenges in maintaining signal quality due to noise and contention from other networks using the same frequency band, requiring an efficient method for channel selection that adapts to varying performance-reducing factors over time.
Innovation Solution
A method for selecting an operating channel in WLANs that involves continuous data communication over multiple channels, measuring performance over extended periods, ranking channels based on noise and contention levels, and dynamically switching to better-performing channels without pausing communication, using a transceiver, performance measurer, and channel ranking system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If performance measurements are conducted by pausing communication on the current channel, then channel performance can be measured, but communication continuity is interrupted and measurement time is consumed
Solution Approach 1:
The system performs preliminary actions by measuring channel performance in advance during low-activity periods or using historical data, so that when channel switching is needed, the decision can be made without interrupting active communication. The access point proactively collects performance data before it becomes critical.
Solution Approach 2:
The patent introduces an intermediary mechanism where the access point uses a separate measurement process that does not interfere with data communication. By using background measurement threads or statistical sampling during normal operation, the system obtains performance data without pausing actual data transmission.
2Productivity
If performance measurements are conducted over short periods, then measurement speed is high, but sufficient performance data cannot be collected
Solution Approach 1:
The system maintains continuous channel performance measurement by operating measurement processes concurrently with data communication. The access point continuously collects performance metrics over extended periods without interruption, ensuring both sufficient data quantity and ongoing productivity.
Solution Approach 2:
The patent implements periodic measurement cycles where the access point samples channel performance at regular intervals over extended periods. This periodic sampling accumulates sufficient statistical data while maintaining normal communication operations, balancing measurement thoroughness with productivity.
3Productivity
If the same radio performs both data communication and channel measurement, then device resources are utilized efficiently, but measurement accuracy may be compromised
Solution Approach 1:
The patent segments the measurement function by creating a dedicated measurement process that operates independently from data communication handling. Even though the same radio hardware is used, the measurement operations are segmented in time and processing logic, allowing accurate measurement without compromising data communication or vice versa.
Data Source
AI summary
There is disclosed a method of selecting a channel for wireless communication in a network, including communicating data over a first communication channel between an access point and a client device for a first time period, during the first time period, obtaining a first performance measurement indicative of the performance of the first channel, communicating data over a second communication channel between the access point and the client device for a second time period, during the second time period, obtaining a second performance measurement indicative of the performance of the second channel, ranking the first and second channels in order of performance taking the first and second performance measurements into account when doing so, selecting an operating channel using the outcome of the ranking.