Sensor Sharing With Reference Entities for Accurate Object Positioning
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Solution Overview
Problem
Existing wireless communication systems, particularly in vehicle-to-everything (V2X) systems, face significant position error issues when sharing object positions using global positioning systems, which can negatively impact safety and driving decisions due to large absolute position errors.
Innovation Solution
A method where user equipment (UE) shares sensor information by determining the position of an object relative to a common reference entity detectable by both the sending and receiving UEs, transmitting a sensor sharing message (SSM) with the reference entity's position, allowing receiving UEs to determine the object's position based on sensor measurements, which are typically more accurate than positioning system measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If positioning systems (GPS/GNSS) are used to determine absolute positions of UEs for object position sharing, then the system can provide absolute location information, but the position accuracy deteriorates with large errors on the scale of one or more meters
Solution Approach 1:
The patent introduces a reference entity (such as a roadside unit or fixed infrastructure element) as an intermediary between the sending UE and receiving UE. Instead of directly sharing absolute positions from GPS/GNSS which have large errors, the system uses the reference entity as a common reference point. Both UEs determine relative positions to this reference entity, and the reference entity's known position serves as a mediator to calculate the object's position with much higher accuracy, reducing errors from meters to potentially centimeters or millimeters scale.
2Measurement precision
If sensor sharing information is transmitted frequently to maintain accurate object position tracking, then the position information remains up-to-date, but the network resource consumption and message overhead increase
Solution Approach 1:
The patent establishes a reference entity and its position information in advance before actual object tracking begins. By pre-configuring the reference framework, the system eliminates the need for frequent absolute position calculations and transmissions. The reference entity serves as a stable baseline that remains valid over time, allowing UEs to update only relative position changes rather than complete position information, thereby reducing network resource consumption while maintaining accuracy.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may detect an object and determine to share position information associated with the object with one or more UEs. The UE may select a reference entity detectable by one or more other UEs and determine the position of the detected object relative to the position of the selected reference entity. The UE may transmit, to one or more second UEs, a sensor sharing message that includes the position information of the object relative to the selected reference entity and an indication of the selected reference entity. The one or more second UEs may detect the position of the reference entity and determine the location of the detected object based on the position of the reference entity and the position of the detected object relative to the position of the reference entity.