Electronic Device Location Determination via Trigger and Chirp Signals
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Solution Overview
Problem
Existing electronic devices face challenges in quickly and accurately determining the distance between a user and external devices in real-time, especially when the user or external device locations change.
Innovation Solution
The electronic device employs a method involving a trigger signal and chirp signals to determine the location of external devices. Upon receiving a trigger signal, the device measures the time difference between when the trigger signal is received and when a chirp signal, transmitted by an external device in response, is received. This time difference is used to calculate the location of the external device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the electronic device uses traditional distance measurement methods to determine external device locations, then the location determination can be performed, but the speed and accuracy of obtaining distance information in real-time is insufficient
Solution Approach 1:
The patent employs periodic chirp signal transmission where external devices send distance information signals at regular intervals triggered by a trigger signal. This periodic action enables real-time updates of location data while maintaining high measurement precision through structured signal exchange protocols.
Solution Approach 2:
The patent replaces traditional mechanical or slow communication-based distance measurement methods with acoustic wave-based measurement using chirp signals. This substitution enables faster and more accurate real-time distance determination by utilizing the properties of acoustic wave propagation and time-of-flight measurement.
2Reliability
If the electronic device continuously monitors all external devices to track location changes, then real-time location updates can be achieved, but the complexity and energy consumption increase
Solution Approach 1:
The patent implements preliminary action by having external devices pre-prepare and periodically transmit their location information in response to a trigger signal. This approach ensures real-time tracking reliability without requiring continuous active monitoring by the electronic device, thereby reducing system complexity and energy consumption.
Solution Approach 2:
External devices autonomously measure and report their own location information using the chirp signal method. This self-service mechanism eliminates the need for the electronic device to actively monitor each external device, simplifying the overall system while maintaining reliable real-time location tracking.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method allows for rapid and accurate determination of external device locations, enabling the electronic device to effectively manage user inputs and control operations on external devices based on their relative positions.
Implementation Method 1
obtaining, based on a time point at which the first chirp signal is received, a difference value between a time point at which the trigger signal is received by the electronic device and a time point at which the trigger signal is received by the first external device; and determining a location of the first external device based on the difference value
Data Source
AI summary
A method, performed by an electronic device, of determining a location of an external device includes: receiving a trigger signal, which is output at a first location; receiving, after the trigger signal is received, a first chirp signal transmitted from a first external device among at least one external device present at a different location from a location of the electronic device, the first chirp signal being transmitted according to the trigger signal being received by the first external device; obtaining, based on a time point at which the first chirp signal is received, a difference value between a time point at which the trigger signal is received by the electronic device and a time point at which the trigger signal is received by the first external device; and determining a location of the first external device based on the difference value.