Wideband Receiver Bluetooth Page Scanning Latency Reduction
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Solution Overview
Problem
Conventional Bluetooth page scanning devices rely on narrowband receivers, which consume more power and take longer to synchronize due to their need to wait for specific frequency hops, leading to increased energy consumption and latency.
Innovation Solution
Implementing a wideband receiver that can detect Bluetooth page signals by generating a tone template and aligning it with detected tones to identify valid frequency hopping sequences, allowing for reduced power consumption and faster synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a narrowband receiver is used for Bluetooth page scanning, then the device can synchronize with frequency-hopped transmissions, but the power consumption increases and synchronization time is longer
Solution Approach 1:
The patent segments the frequency hopping sequence into detectable individual tones within a wideband spectrum. Instead of waiting for complete frequency hops like narrowband receivers, the system divides the broadband signal into multiple frequency components that can be independently detected and reconstructed to identify the hopping pattern.
Solution Approach 2:
The system performs preliminary detection of frequency tones across the entire bandwidth before full synchronization is needed. By detecting tones in advance and identifying the hopping sequence pattern, the receiver prepares synchronization information proactively rather than reactively waiting for specific frequency hops to occur.
2Reliability
If a narrowband receiver waits for specific frequency hops to synchronize, then frequency synchronization can be established, but the latency increases
Solution Approach 1:
The patent transitions from time-domain sequential frequency hopping detection to frequency-domain parallel tone detection. By analyzing multiple frequency components simultaneously across the broadband spectrum, the system identifies hopping sequences in a single wideband observation window rather than sequentially waiting for each frequency hop to occur in time.
Solution Approach 2:
The system performs preliminary detection of frequency tones across the entire bandwidth before full synchronization is needed. By detecting tones in advance and identifying the hopping sequence pattern, the receiver prepares synchronization information proactively rather than reactively waiting for specific frequency hops to occur.
3Productivity
If a wideband receiver is used to detect Bluetooth page signals, then power consumption and latency are reduced, but the complexity of detecting and validating frequency hopping sequences increases
Solution Approach 1:
The patent creates a template or model of the expected frequency hopping sequence based on detected tones. This template serves as a reference copy that can be compared against actual received signals to validate whether a detected sequence is legitimate, simplifying the validation process by providing a known-good reference pattern.
Solution Approach 2:
The system uses feedback from tone detection results to refine frequency hopping sequence identification. Detected tones provide feedback that confirms or refutes hypothesized hopping patterns, allowing the receiver to iteratively validate sequences and adjust detection parameters based on what is actually observed in the wideband signal.
Data Source
AI summary
A page scanning device configured to generate a sequence mask for an expected frequency hopping sequence, select a first tone among a plurality of detected tones, first determine whether the first tone is included within an expected hop sequence, generate a first tone template in response to determining that the first tone is included within the expected hop sequence, align the first tone template with the plurality of detected tones based on the first tone, second determine whether the first tone template matches the plurality of detected tones, and detect a valid frequency hopping sequence in response to determining that the first tone template matches the plurality of detected tones.