Distance Determination via Reference Signal Intensity Comparison
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Solution Overview
Problem
In IoT environments, accurately measuring the distance between devices is challenging due to varying environmental conditions, as existing methods lack precision in determining distances based on signal intensity changes.
Innovation Solution
A method involving a device receiving a first signal from a target device and intensity information from a reference device, using Bluetooth Low Energy (BLE) protocol for short-range communication, to determine the distance by comparing signal intensities and establishing communication based on these measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If distance determination is based on signal intensity measurements, then distance can be estimated between devices, but measurement precision deteriorates due to varying environmental conditions
Solution Approach 1:
A reference device is introduced as an intermediary between the target device and the determining device. The reference device receives signals from the target device and provides reference intensity information to the determining device. This intermediary enables the determination device to compare its received signal intensity against the reference intensity from the reference device, thereby compensating for environmental variations and improving distance measurement precision without sacrificing reliability
Solution Approach 2:
The system utilizes changes in signal intensity parameters as devices move relative to each other. By monitoring how the received signal intensity changes and comparing it with reference intensity values from the reference device, the system can determine distance while compensating for environmental factors. This parameter-based approach allows accurate distance measurement despite varying environmental conditions
2Measurement precision
If environmental variations are accounted for to improve measurement precision, then distance determination becomes more complex
Solution Approach 1:
The reference device serves as a mediator that handles the complexity of environmental compensation. Instead of requiring the determining device to independently account for all environmental variations, the reference device provides pre-processed reference intensity information that already factors in environmental conditions. This distributes the complexity across multiple devices rather than concentrating it in one device
Solution Approach 2:
The system implements a feedback mechanism where the determining device receives reference intensity information from the reference device and uses this feedback to adjust its distance calculations. The feedback loop allows the system to continuously refine distance measurements by comparing actual signal intensity with expected intensity based on reference data, improving precision without requiring overly complex processing in each device
Data Source
AI summary
A method of determining a distance between devices, including receiving, by a device, a first signal from a target device, the first signal being associated with a first intensity; receiving, from a reference device located at a predetermined distance from the target device, intensity information corresponding to a second intensity associated with a second signal received by the reference device from the target device; and determining a distance between the device and the target device based on the first intensity and the intensity information corresponding to the second intensity.