Vehicle-Mounted Device Lane Filtering via Roadside ID Comparison
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Solution Overview
Problem
Existing vehicle-mounted devices without navigation functions in road-vehicle communication systems struggle to accurately determine their lane and direction, leading to confusion and safety risks due to incorrect information reception from opposite lanes, as existing solutions like radio wave absorbers are costly and impractical for general roads.
Innovation Solution
A vehicle-mounted device that receives identification information from roadside apparatuses to determine whether provided content information is intended for its own lane, allowing it to filter out irrelevant information by comparing stored and transmitted IDs, ensuring only relevant information is output to the driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radio wave absorbers are installed to prevent leakage and irregular reflection of radio waves, then information accuracy for the correct lane is improved, but system cost and infrastructure complexity increase enormously
Solution Approach 1:
The patent introduces an intermediary identification mechanism (roadside apparatus ID and via roadside apparatus ID) that mediates between the radio wave transmission and the vehicle-mounted device. This intermediary system allows the vehicle to identify and filter information from the correct lane without requiring physical radio wave containment structures, thus resolving the contradiction between information accuracy and infrastructure complexity
Solution Approach 2:
The patent replaces the mechanical/physical approach of using radio wave absorbers with an information-processing approach using identification codes and logical comparison. Instead of physically blocking or directing radio waves, the system uses data identification (roadside apparatus ID and via roadside apparatus ID) to ensure information accuracy, eliminating the need for complex physical infrastructure
2Reliability
If radio wave absorbers are installed to suppress irregular reflection and leakage, then driving safety is improved, but implementation cost becomes prohibitive for general roads
Solution Approach 1:
The patent substitutes the expensive mechanical solution of radio wave absorbers with an inexpensive information-processing solution using identification codes. The vehicle-mounted device compares roadside apparatus ID and via roadside apparatus ID to determine lane relevance, achieving driving safety without the enormous costs associated with physical radio wave containment infrastructure
Solution Approach 2:
The patent uses inexpensive identification data (roadside apparatus ID and via roadside apparatus ID) instead of expensive physical infrastructure. These information elements are virtually costless to transmit and process, making the solution economically viable for general road deployment compared to the prohibitively expensive radio wave absorber approach
3Quantity of substance
If the vehicle-mounted device receives all transmitted information without filtering, then information completeness is maintained, but driver confusion increases and safety deteriorates
Solution Approach 1:
The patent extracts only the relevant information for the vehicle's current lane by comparing roadside apparatus ID and via roadside apparatus ID. This extraction process separates useful information (for the current lane) from harmful information (for opposite lanes), maintaining information completeness for the correct lane while eliminating driver confusion from irrelevant information
Solution Approach 2:
The patent implements a feedback mechanism where the vehicle-mounted device continuously compares received roadside apparatus ID with stored via roadside apparatus ID to determine whether information is relevant. This feedback loop ensures that only appropriate information is presented to the driver, preventing confusion while maintaining completeness of relevant information
Data Source
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AI summary
A road-vehicle communication system comprises roadside apparatuses, a center device, and a vehicle-mounted device mounted in a vehicle. The roadside apparatuses are each given identification information for identifying itself. The center device transmits to the vehicle the identification information about a first roadside apparatus installed on the road where the vehicle is traveling as first identification information via the first roadside apparatus and the identification information about a second roadside apparatus via which the vehicle is expected to travel to the destination as second identification information when the vehicle is traveling in the lane of the road where the first roadside apparatus is installed. The vehicle-mounted device stores the transmitted first identification information. If the secondarily transmitted second identification information includes the stored first identification information, the vehicle-mounted device reproduces content information transmitted together with the second identification information. The vehicle-mounted device judges whether or not the content information is for the lane where the vehicle is traveling and reproduces the content information if so.