User Equipment Preamble Echo Person Presence Detection
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Solution Overview
Problem
Current wireless communication systems face challenges in accurately detecting the presence of a person using existing methods, which can lead to false positives and missed detections, especially in self-driving vehicles and buildings, due to limitations in sensor technologies and interference with cellular networks.
Innovation Solution
The implementation of a method at user equipment (UE) that transmits a preamble using beamforming and detects a person based on the power level of the echo received, satisfying a threshold, while minimizing interference with existing networks by adjusting transmission power and beam direction, and combining with sensor data for accurate detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing sensor methods are used to detect person presence, then the system can operate with simple technology, but detection accuracy deteriorates leading to false positives and missed detections
Solution Approach 1:
The patent combines multiple detection approaches (sensor data and wireless echo analysis) into a unified detection system. The communication manager integrates sensor readings with echo power level analysis to make combined determination about person presence, thereby improving detection accuracy while avoiding the limitations of individual methods
Solution Approach 2:
The wireless communication system is made multi-functional by enabling it to perform both its primary communication function and person presence detection function. The same wireless infrastructure and signal processing components are used for both data transmission and detecting reflections from persons, reducing the need for dedicated detection hardware
2Reliability
If sensor technologies are used for person detection, then the system can provide detection capability, but interference with cellular networks increases
Solution Approach 1:
The patent uses wireless signals as an intermediary medium for detection rather than direct sensor measurement. The system transmits preambles and analyzes their echoes (reflections) to detect person presence indirectly, avoiding direct interaction with cellular network infrastructure that would cause interference
Solution Approach 2:
The wireless communication system serves its own detection needs by utilizing its transmitted signals and received echoes for person presence detection. The same communication infrastructure provides both communication and detection functions, eliminating the need for separate detection systems that would generate additional interference
3Measurement precision
If beamforming is used to transmit preambles, then detection accuracy improves, but transmission power requirements increase
Solution Approach 1:
The patent applies beamforming to concentrate transmission energy in specific directional beams rather than omnidirectional transmission. By focusing power locally in targeted directions where persons are likely to be detected, the system achieves improved echo detection accuracy while reducing overall power consumption compared to uniform high-power transmission in all directions
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 approach effectively detects the presence of a person with reduced false positives and interference, enabling precise control of environmental settings such as temperature and lighting in vehicles and buildings.
Implementation Method 1
receive an echo based at least in part on the preamble transmitted in the direction
Implementation Method 2
transmit a preamble in a direction using beamforming
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit a preamble in a direction using beamforming. The UE may receive an echo based at least in part on the preamble transmitted in the direction. The UE may detect a presence of a person based at least in part on a power level associated with the echo satisfying a threshold. Numerous other aspects are described.