Vehicle-Mounted Device Direction Filtering for ITS
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Solution Overview
Problem
In Intelligent Transport Systems (ITS) using Dedicated Short Range Communication (DSRC), it is difficult to provide only necessary information to users as the wireless transmission of information across lanes leads to confusion, with no mechanism to discriminate traveling directions, resulting in unnecessary information being provided.
Innovation Solution
A vehicle-mounted device equipped with direction detection means, such as terrestrial magnetism sensors, compares the vehicle's orientation direction with the direction information in the received radio wave to determine whether to output specific information like emergency disaster or safe driving support information, ensuring only relevant information is provided to the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless transmission is used to provide traffic information across multiple lanes, then information coverage is improved, but information relevance deteriorates due to direction mismatch
Solution Approach 1:
The patent segments the wireless information transmission by direction, dividing the broadcast information into direction-specific groups. The direction detection unit separates information received from different directions (front, rear, left, right) and the control unit outputs only the information relevant to the vehicle's current traveling direction, thus maintaining information coverage while improving relevance.
Solution Approach 2:
The patent applies local quality by making the information output specific to the local direction of travel. Instead of uniformly outputting all received information, the system tailors the information output to match the vehicle's current orientation and traveling direction, ensuring that each direction receives only locally relevant traffic information.
2Loss of information
If direction detection is added to filter information by traveling direction, then information relevance is improved, but device complexity increases
Solution Approach 1:
The control unit serves multiple functions: it manages information reception, performs direction comparison, filters information by relevance, and controls output. By making the control unit multi-functional rather than adding separate dedicated components for each function, the patent improves information relevance while minimizing the increase in device complexity.
Solution Approach 2:
The system uses the vehicle's existing navigation or orientation data to perform direction detection and comparison, rather than requiring entirely new sensing systems. The control unit automatically compares the detected direction with the vehicle's traveling direction and self-regulates information output, reducing the need for additional complex components.
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 solution effectively filters unnecessary information by matching the vehicle's direction with the direction information in the radio wave, providing users with only necessary information, thus enhancing the clarity and relevance of the data received.
Implementation Method 1
The direction detection means of an embodiment includes terrestrial magnetism detection means for detecting terrestrial magnetism
Data Source
AI summary
A vehicle-mounted device (10) which receives and outputs a radio wave containing at least direction information as information includes: detection means which detects the radio wave; and control means which compares the detection direction received from the direction detection means which detects the direction of the vehicle head to the direction information so as to judge whether the information is to be outputted. Thus, it is possible to provide a vehicle-mounted device which can provide only the information required by a user, a method for outputting the information, and an information providing system.