Sound-Wave Positioning for GPS-Degraded Wireless Terminals
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately measuring the position of user equipment (UE) in specific areas where GPS or GNSS degradation occurs, necessitating improved methods for position measurement to ensure accuracy and reliability.
Innovation Solution
A method and apparatus for measuring UE position using sound wave signals, involving reporting capability and state information, calculating time differences of arrival, and determining frequency bands and multiplexing types based on noise and movement speed to enhance position measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If GPS or GNSS is used for position measurement, then position measurement can be performed, but position measurement accuracy degrades in specific areas (e.g., urban canyons, indoors)
Solution Approach 1:
The patent introduces sound wave signals as an intermediary medium to transfer positioning information between base stations and user equipment. Instead of relying directly on satellite signals that degrade in urban canyons or indoors, the system uses acoustic waves transmitted through the air medium to carry positioning data, enabling reliable position measurement in GPS-denied areas.
Solution Approach 2:
The patent replaces the electromagnetic signal-based positioning system (GPS/GNSS) with an acoustic wave-based positioning system. By substituting radio waves with sound waves, the system leverages the different propagation characteristics of acoustic waves to achieve positioning capability in environments where electromagnetic satellite signals fail.
2Measurement precision
If sound wave signals are used for position measurement, then position measurement accuracy improves in GPS-degraded areas, but system complexity increases
Solution Approach 1:
The patent makes the sound wave signal transmission system serve multiple functions: it simultaneously provides positioning services and can carry communication data. The base stations transmit sound waves that serve both as positioning references and as part of the communication infrastructure, eliminating the need for separate dedicated positioning hardware and reducing overall system complexity.
Solution Approach 2:
The patent adjusts the frequency parameters of sound wave signals to optimize positioning performance. By selecting appropriate frequency bands and adjusting signal characteristics, the system achieves accurate time difference of arrival measurements while maintaining compatibility with existing communication infrastructure, thereby reducing the need for entirely new hardware systems.
3Measurement precision
If time difference of arrival is calculated for position measurement, then position can be determined, but measurement accuracy is affected by noise and movement speed
Solution Approach 1:
The patent implements feedback mechanisms where the user equipment reports its movement speed and noise conditions back to the base station. This feedback information is then used to dynamically adjust positioning parameters, select optimal frequency bands, and compensate for noise and motion effects in the time difference of arrival calculations, thereby maintaining high positioning accuracy under varying environmental conditions.
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
Ensures accurate and reliable position measurement of UE even in areas where GPS or GNSS degradation occurs, maximizing safety services by utilizing robust sound wave signals.
Implementation Method 1
calculating a time difference of arrival between the sound wave signals, and measuring a position of the first terminal based on the time difference of arrival
Implementation Method 2
receiving sound wave signals from two or more devices based on the first setting information
Data Source
AI summary
According to various embodiments, disclosed are a method by which a first terminal measures a position in a wireless communication system, and an apparatus therefor. Disclosed are a method and an apparatus therefor, the method comprising the steps of: reporting capability information related to the first terminal; reporting state information related to the first terminal; receiving first configuration information related to positioning; receiving sound wave signals from two or more devices on the basis of the first configuration information; calculating a reception time difference between the sound wave signals; and measuring the position of the first terminal on the basis of the reception time difference.