Vehicle Terminal Position Sharing Dynamic Notification Frequency
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Solution Overview
Problem
Current self-position sharing systems between vehicles and terminals incur increased communication and device loads due to continuous position correction, which is undesirable and inefficient.
Innovation Solution
A self-position sharing system where a vehicle estimates its position with higher accuracy and notifies a terminal at varying frequencies based on measurement accuracy and specific conditions, such as distance and power availability, allowing the terminal to reduce its own measurement frequency and load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If continuous communication is performed between the terminal and vehicle for position correction, then position measurement accuracy is improved, but communication load and device load increase
Solution Approach 1:
The patent implements periodic position estimation by the vehicle at predetermined intervals and periodic notification to the terminal, replacing continuous communication. The vehicle estimates its position periodically and notifies the terminal at these periodic intervals, thereby maintaining position accuracy while significantly reducing communication load and device load compared to continuous correction methods.
2Measurement precision
If the vehicle notifies the terminal of position information at high frequency, then position measurement accuracy is improved, but communication load and device load increase
Solution Approach 1:
The vehicle performs position estimation at predetermined periodic intervals and notifies the terminal periodically, rather than continuously or at excessively high frequencies. This periodic notification approach maintains sufficient position accuracy for navigation purposes while significantly reducing the processing load on both the vehicle's notification function and the terminal's reception and processing functions.
Solution Approach 2:
The patent dynamically adjusts the notification frequency parameter based on various conditions such as vehicle speed, position change magnitude, and GPS signal quality. When the vehicle is stationary or position changes are minimal, notification frequency is reduced. When the vehicle is moving rapidly or GPS accuracy deteriorates, notification frequency is increased, thereby optimizing the balance between position accuracy and device load under different operating conditions.
Data Source
AI summary
A terminal in a self-position sharing system that is installed in a vehicle and is capable of communicating with the vehicle includes a measurement device that measures a self-position of the terminal. Further, the vehicle in the self-position sharing system includes: a processor configured to estimate a self-position of the vehicle with measurement accuracy higher than that of the terminal at a predetermined period, determine whether or not measurement accuracy of a self-position by the terminal decreases, set a notification frequency of notifying the terminal of an estimated self-position of the vehicle to a first frequency when the measurement accuracy does not decrease, set the notification frequency to a second frequency higher than the first frequency when the measurement accuracy decreases; and notify the terminal of an estimated self-position of the vehicle with the set notification frequency.