PRS Measurement Sharing via Sidelink for 5G Positioning
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Solution Overview
Problem
Current 5G wireless communication systems face challenges in achieving high spectral efficiency, reducing latency, and improving positioning accuracy, particularly in scenarios requiring simultaneous connections of tens of thousands of users with reliable and efficient PRS measurements.
Innovation Solution
User equipment (UE) devices are configured to share PRS measurements via sidelink communication, allowing one UE to receive position information from another, form virtual UEs for group positioning, and cross-validate measurements to determine reliable PRS data, thereby reducing processing overhead and enhancing positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If each UE performs independent PRS measurements, then positioning accuracy is maintained, but processing overhead and resource consumption increase
Solution Approach 1:
Multiple UEs merge their PRS measurement results to form a combined measurement set. The network collects PRS measurements from multiple UEs and combines them to determine positioning information, reducing the processing load on individual UEs while maintaining positioning accuracy through aggregated data.
Solution Approach 2:
The network entity acts as an intermediary that collects PRS measurements from multiple UEs and performs the positioning calculation. Instead of each UE independently processing measurements, the network aggregates the measurements and computes the positioning information, reducing UE processing overhead.
2Quantity of substance
If more UEs are connected simultaneously, then system capacity increases, but spectral efficiency decreases
Solution Approach 1:
Multiple UEs share common PRS measurement resources and combine their measurements for positioning. This merging approach allows the system to serve more UEs simultaneously using the same spectral resources, increasing system capacity while maintaining spectral efficiency through coordinated measurement sharing.
3Measurement precision
If PRS measurements are shared between UEs, then positioning accuracy improves, but measurement reliability may be compromised
Solution Approach 1:
The network provides feedback information about PRS measurement quality and reliability to UEs. The network entity determines positioning information based on PRS measurements and can indicate which measurements are reliable, allowing UEs to selectively use high-quality measurements while filtering out unreliable ones.
Solution Approach 2:
The system dynamically adjusts measurement parameters and selection criteria based on channel conditions and measurement quality. The network can modify which PRS measurements are collected and how they are weighted based on current network conditions, optimizing both accuracy and reliability.
Data Source
AI summary
A position information reporting method includes: communicating by a first UE with a second UE to identify a first PRS measurement to be made by the second; receiving, by the first UE from the second UE via sidelink communication, first position information based on the first PRS measurement; and transmitting, from the first UE to a network entity, the first position information.