Co-Located V2X User Equipment Positioning With Shared Estimates
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Solution Overview
Problem
In V2X environments, positioning of co-located user equipment, such as pedestrian and vehicle user equipment, results in redundant over-the-air signaling and increased radio frequency bandwidth usage without improving accuracy, leading to inefficiencies in power consumption and bandwidth utilization.
Innovation Solution
A method where pedestrian user equipment indicates a co-located state to a network node, allowing it to switch positioning signals to vehicle user equipment, enabling the network to utilize the vehicle's position estimate for both devices, thereby reducing redundant signaling and conserving power and bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If positioning signals are transmitted to both pedestrian user equipment and vehicle user equipment separately, then position estimation accuracy is maintained, but signaling overhead and radio frequency bandwidth usage increase
Solution Approach 1:
The patent combines the positioning processes of co-located pedestrian user equipment and vehicle user equipment into a single positioning operation. When the network determines that both devices are co-located based on proximity information, it performs positioning signal exchanges only with the vehicle user equipment, and both devices share the resulting position estimate. This merging eliminates redundant signaling while maintaining positioning accuracy.
Solution Approach 2:
The vehicle user equipment serves multiple functions: it acts as both a standalone positioning target and as a representative for the co-located pedestrian user equipment. By establishing the vehicle UE's position, the system simultaneously obtains position information for both the vehicle and the pedestrian, making the positioning system more efficient and reducing the overall signaling burden.
2Measurement precision
If positioning signals are transmitted to both pedestrian user equipment and vehicle user equipment separately, then position estimation accuracy is maintained, but radio frequency bandwidth consumption increases
Solution Approach 1:
The patent merges the positioning signal exchanges for co-located pedestrian and vehicle user equipment into a single set of exchanges with the vehicle user equipment. This consolidation reduces the total volume of positioning signals transmitted over the radio interface, thereby conserving radio frequency bandwidth while maintaining the ability to accurately determine positions of both devices.
3Measurement precision
If separate positioning is performed for pedestrian and vehicle user equipment, then individual position accuracy is ensured, but power consumption of pedestrian user equipment increases
Solution Approach 1:
The patent extracts the positioning function from the pedestrian user equipment when co-location with a vehicle is detected. Instead of requiring the pedestrian device to actively participate in positioning signal exchanges, the system obtains positioning information through the vehicle user equipment and applies it to the pedestrian device as well. This extraction significantly reduces the power consumption of the pedestrian user equipment while maintaining position accuracy.
Data Source
AI summary
Techniques are provided for determining the position of co-located wireless nodes. An example method for positioning co-located user equipment in a vehicle-to-everything (V2X) environment includes determining a first distance to a first wireless node, sending an indication of a co-located state to a second wireless node based at least in part on the first distance to the first wireless node, receiving a first position estimate based at least in part on radio frequency signal exchanges between the first wireless node and the second wireless node, determine a second distance to the first wireless node, sending an indication of a non-co-located state to the second wireless node based at least in part on the second distance to the first wireless node, and determining a second position estimate based at least in part on radio frequency signal exchanges with the second wireless node.