Vehicle Road Type Identification via Speed Distribution
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Solution Overview
Problem
Existing methods for determining road types, such as those described in Patent Literature 1, require accurate map information and cannot assist vehicles without such information in identifying the type of road they are traveling on.
Innovation Solution
An information providing device and method that uses a communication unit to transmit vehicle speed distributions for map tiles to vehicles, created based on data from probing vehicles, allowing vehicles without map information to identify road types by comparing their speed and direction with stored data, and optionally includes incident position information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If map information is used to determine road type, then road type determination accuracy is improved, but the method cannot be applied to vehicles without map information
Solution Approach 1:
The patent introduces an information providing device as an intermediary that collects road type determination results from multiple vehicles (including those with map information) and transmits this aggregated information to other vehicles. This mediator enables vehicles without map information to access road type data indirectly through communication, resolving the contradiction between determination accuracy and system accessibility.
Solution Approach 2:
The system implements a feedback mechanism where vehicles transmit their determined road type information and position data to the information providing device, which then relays this feedback to other vehicles. This feedback loop allows vehicles without map information to benefit from the collective knowledge of the vehicle fleet, enabling road type identification without requiring individual vehicles to possess map information.
2Adaptability or versatility
If vehicle speed distribution information is transmitted to all vehicles, then vehicles without map information can identify road types, but communication data load increases
Solution Approach 1:
The patent segments the information transmission by providing road type determination information on a per-vehicle-request basis rather than broadcasting to all vehicles simultaneously. The information providing device transmits speed distribution information and road type data only to vehicles that request it and are located in relevant areas, thereby reducing overall communication data volume while maintaining accessibility for vehicles without map information.
Data Source
AI summary
The information providing device includes a communication unit capable of communicating with a plurality of vehicles, a storage unit configured to store a distribution of vehicle speeds corresponding to a traveling direction in each of an automobile dedicated road and a general road on each of map tiles, and a processor configured to transmit, to a target vehicle among the plurality of vehicles, information of the distribution for a map tile including a current position of the target vehicle.