Relative Position Reporting for Vulnerable Road Users
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current vehicular communication systems face challenges in accurately determining the relative position of user equipment (UE) associated with Vulnerable Road Users (VRUs), as they rely on absolute position reporting, which burdens receivers with analysis and requires frequent, accurate updates.
Innovation Solution
The UE determines its relative position with respect to one or more reference points using onboard sensors like radar, lidar, ultrasonic, and cameras, and sends a report to vehicle On-Board Units (OBUs) in a wireless network, including identifiers for the reference points and distance or distance vectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If absolute position reporting is used, then position information can be transmitted, but receivers bear the computational burden of analyzing position data and frequent updates are required
Solution Approach 1:
The patent introduces a reference point as an intermediary between the transmitter and receiver. Instead of the receiver directly analyzing absolute position data, the transmitter reports relative position with respect to a shared reference point, simplifying the receiver's computational task while maintaining positioning accuracy.
Solution Approach 2:
The patent extracts the computational burden of position analysis from the receiver by pre-calculating and reporting relative position information. The complex analysis is taken out and performed at the transmitter side, leaving the receiver with simpler processing tasks.
2Measurement precision
If absolute position reporting is used, then position information is provided, but frequent updates are required to maintain accuracy
Solution Approach 1:
The reference point acts as a stable intermediary that remains constant or changes slowly. By reporting relative position to this stable reference rather than absolute position, the system reduces the frequency of updates needed while maintaining accuracy, as small movements can be detected as changes relative to the reference point.
3Ease of operation
If relative position reporting with reference points is used, then computational burden on receivers is reduced, but the system must establish and maintain reference point information
Solution Approach 1:
The reference point serves multiple functions: it provides a basis for relative position measurement, acts as a shared coordinate system between transmitter and receiver, and enables efficient position updates. This multi-functionality justifies the added complexity of reference point management by providing substantial benefits in simplified receiver operations.
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 approach provides more accurate distance measurements with respect to objects or road features, reducing the computational burden on receivers and allowing for as-needed position information transmission, thereby enhancing safety and efficiency in vehicular communication systems.
Implementation Method 1
The relative position may be determined based on data from one or more one board sensors, such as radar
Implementation Method 2
The relative position may be determined based on data from one or more one board sensors, such as radar, lidar
Implementation Method 3
The relative position may be determined based on data from one or more one board sensors, such as radar, lidar, ultrasound
Data Source
AI summary
A user equipment (UE), for example, used with a Vulnerable Road User, determines a relative position of the UE and sends a report of the relative position to one or more vehicle On-Board Units (OBUs), wherein the report further includes an identification of the one or more reference points. The relative position may be with respect to one or more reference points, which may be stationary or moving. The relative position may be determined and reported based on identifiers for the one or more reference points and distance or distance vectors to each of the one or more reference points. The relative position may be determined based on data from one or more one board sensors, such as radar, lidar, ultrasound, or camera, as well as with wireless transceivers. The relative position may additionally include a heading and a placement with respect to one or more street elements.