Pedestrian GPS Accuracy via Vehicle Offset Transfer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Pedestrian navigation systems face significant positioning accuracy issues due to low GPS signal accuracy in urban areas, exacerbated by multiple path reflections and obstructions, which limits their effectiveness and can lead to missed encounters between drivers and passengers.
Innovation Solution
The method involves using short-range wireless communication, such as Bluetooth or Low Energy Bluetooth, to transfer GPS positioning errors from nearby motor vehicles to untargeted pedestrians. Vehicles calculate and broadcast correction data ({ΔX, ΔY}) to nearby pedestrians, which can then apply these corrections to improve their GPS positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If GPS is used for pedestrian navigation in urban areas, then navigation availability is improved, but positioning accuracy deteriorates due to signal obstructions and multiple path reflections
Solution Approach 1:
The patent introduces motor vehicles as intermediary devices to transfer positioning correction data to pedestrians. Vehicles act as mediators between the GPS system and pedestrians, utilizing their superior positioning accuracy (derived from multiple satellites and road constraints) to correct pedestrian location errors through wireless communication, thereby resolving the accuracy problem without compromising navigation availability
2Measurement precision
If vehicles use multiple satellites and road constraints for positioning, then vehicle positioning accuracy is improved, but the complexity of the positioning system increases
Solution Approach 1:
The patent extracts only the essential positioning correction data ({ΔX, ΔY} coordinates) from the complex vehicle positioning system and transmits merely this corrected information to pedestrians via wireless communication. This extraction approach allows vehicles to maintain their complex multi-satellite and road-constraint positioning methods while sharing only the necessary corrected position data, avoiding the need for pedestrians to implement complex positioning algorithms
Data Source
AI summary
A method for improving accuracy of a raw GPS positioning of an untargeted pedestrian device wherein the pedestrian device receives from a nearby vehicle device a message containing a calculated offset between a raw GPS location of the vehicle and a corrected location of the vehicle, the message being received as a direct consequence of the pedestrian device and the vehicle device coming into mutual communication range without a need for pairing between the two devices. The calculated offset is applied to the raw GPS positioning of the pedestrian device to obtain a more accurate location of the pedestrian device.