Bluetooth Frequency Class Selection for Wi-Fi Interference
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Solution Overview
Problem
Bluetooth devices face interference from Wi-Fi devices in shared frequency bands, leading to reduced communication quality and throughput, and existing Adaptive Frequency Hopping (AFH) methods are time-consuming, causing potential communication interruptions.
Innovation Solution
A method to quickly choose working Bluetooth frequency points by dividing Bluetooth frequencies into classes based on their relationship with non-overlapping Wi-Fi channels, determining qualified frequency groups, and saving these frequencies into a channel map table for efficient AFH operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional AFH methods are used to select Bluetooth frequency points, then interference from Wi-Fi devices can be reduced, but the selection process is time-consuming and causes communication interruptions
Solution Approach 1:
The patent pre-divides the Bluetooth frequency spectrum into multiple frequency classes based on their relationship with Wi-Fi channels before actual communication occurs. This preliminary classification creates a structured framework that enables rapid frequency selection during operation, eliminating the need for time-consuming real-time analysis while maintaining anti-interference capability.
Solution Approach 2:
The patent segments the Bluetooth frequency range into distinct frequency classes (first through fourth classes) based on their overlap relationships with Wi-Fi channels. This segmentation allows the system to quickly identify suitable frequency groups without examining individual frequencies, significantly reducing selection time while preserving interference avoidance.
2Adaptability or versatility
If Bluetooth devices operate in shared 2.4 GHz frequency band with Wi-Fi devices, then wireless communication coverage is maintained, but communication quality and throughput are reduced due to interference
Solution Approach 1:
The patent applies different quality characteristics to different frequency classes based on their interference levels. Frequency classes with less Wi-Fi overlap are designated as more suitable for communication, while those with significant overlap are avoided. This local differentiation allows the system to maintain operation in the shared 2.4 GHz band while optimizing throughput by selecting only the high-quality frequency segments.
3Measurement precision
If all Bluetooth frequencies are individually evaluated for interference, then accurate frequency selection is achieved, but the complexity and time required for frequency selection increases significantly
Solution Approach 1:
The patent divides the frequency evaluation process into hierarchical segments: first dividing Bluetooth frequencies into classes based on Wi-Fi channel relationships, then evaluating frequency groups rather than individual frequencies. This segmentation maintains measurement precision at the group level while dramatically reducing computational complexity compared to individual frequency evaluation.
Solution Approach 2:
The patent evaluates a representative sample of frequencies within each frequency group rather than every individual frequency. By detecting a predetermined number of qualified or unqualified frequencies in each group, the system achieves sufficient accuracy for practical purposes while avoiding the excessive complexity of complete enumeration.
Data Source
AI summary
A Bluetooth receiver includes a memory; and one or more processors in communication with the memory, the one or more processors configured to perform operations including: dividing Bluetooth frequencies of the Bluetooth receiver into Bluetooth frequency classes based on a frequency relationship among Bluetooth channels of the Bluetooth receiver and non-overlapping Wi-Fi channels of an interfering Wi-Fi device operating in a Wi-Fi frequency range within the Bluetooth frequency range, each Bluetooth frequency class including one or more Bluetooth frequency groups; determining one or more working Bluetooth frequency groups of the Bluetooth frequency classes based on pre-determined requirements, and saving entire working Bluetooth frequencies within the one or more working Bluetooth frequency groups into a channel map table, which can be used for Adaptive Frequency Hopping (AFH) to reduce Wi-Fi interferences caused by the Wi-Fi device. The Bluetooth receiver may efficiently and quickly choose working Bluetooth frequency points.