Vehicle Signal Intensity Detection for Inside-Outside Device Positioning
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Solution Overview
Problem
Existing V2P communication systems require pre-association of vehicles with communication devices, making it difficult to determine if a communication device is inside or outside a vehicle without prior association, especially for non-ordinary vehicles like buses or taxis.
Innovation Solution
A communication device equipped with an electric wave reception unit to receive internal and external electric waves emitted by in-vehicle communicators, and an inside/outside determination unit to determine the device's location based on the reception intensity of these waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pre-association of vehicle and communication device is implemented, then switching between P-side terminal operation and non-operation can be controlled, but it becomes difficult to determine device location for non-ordinary vehicles like buses or taxis
Solution Approach 1:
The communication device autonomously determines whether it is inside or outside a vehicle by measuring signal intensities from internal and external communicators, without requiring manual pre-association or user input. The device self-manages the determination process and automatically switches its operational mode based on the determined location.
Solution Approach 2:
The patent replaces the mechanical/manual pre-association system with an automated signal-based detection system. Instead of requiring manual pairing between vehicle and device, the system uses electromagnetic signal intensity measurements to automatically determine device location and control operational mode.
2Reliability
If communication device operates as P-side terminal inside vehicle, then traffic safety is improved, but traffic congestion occurs when holder is on board vehicle
Solution Approach 1:
The system continuously monitors the location of the communication device by measuring signal intensities from internal and external communicators. Based on this feedback information, the in-vehicle device automatically controls whether the communication device operates as a P-side terminal, enabling dynamic adaptation to prevent both safety issues and traffic congestion.
3Measurement precision
If communication device switches operation mode frequently, then accurate location-based control is achieved, but battery consumption and communication overhead increase
Solution Approach 1:
The system performs location determination and mode switching only when necessary - when the device transitions between inside and outside the vehicle. Instead of continuous monitoring and switching, the system uses trigger-based operation that activates only when location changes are detected, reducing unnecessary energy consumption and communication overhead.
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
Enables accurate determination of the communication device's location within or outside a vehicle without prior association, allowing for efficient switching between operating as a P-side terminal and not, thereby improving traffic safety and reducing unnecessary communication and battery consumption.
Implementation Method 1
an electric wave reception unit to receive internal electric waves emitted to inside a vehicle by an internal communicator mounted in the vehicle, and to receive external electric waves emitted to outside the vehicle by an external communicator mounted in the vehicle
Data Source
AI summary
A communication device (201) receives internal electric waves (302) emitted toward inside a vehicle (100) by an internal communicator (102) mounted in the vehicle (100), and receives external electric waves (303) emitted toward outside the vehicle (100) by an external communicator (103) mounted in the vehicle (100). The communication device (201) determines whether the communication device (201) is inside the vehicle (100) or outside the vehicle (100), from a reception intensity of the received internal electric waves (302) and from a reception intensity of the received external electric waves (303).