Joint Sidelink Positioning with Uu PRS Signal-Strength Selection
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing increasing data traffic and the need for enhanced mobile broadband communication, particularly in scenarios requiring high reliability and low latency, such as vehicle-to-everything (V2X) communications, where direct UE-to-UE communication without base station intervention is necessary.
Innovation Solution
A method and device for performing joint positioning using both Uu link-based and sidelink-based positioning reference signals (PRS), with the decision to perform joint positioning determined by the received signal strength from a base station or transmission and reception point (TRP).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If joint positioning using both Uu link-based PRS and sidelink-based PRS is performed, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic selection of positioning methods based on RSRP thresholds. The UE compares the RSRP value of the received signal with a threshold to determine whether to perform joint positioning or sidelink-only positioning. This dynamic adaptation allows the system to achieve high positioning accuracy when conditions permit (by using joint positioning with both Uu and sidelink PRS) while reducing complexity when conditions do not permit (by using sidelink-only positioning), thus resolving the contradiction between positioning accuracy and device complexity.
2Reliability
If joint positioning is performed using both Uu and sidelink PRS, then positioning reliability is improved, but processing time increases
Solution Approach 1:
The patent performs preliminary evaluation of the RSRP value before committing to joint positioning. By comparing the RSRP with a threshold in advance, the system determines whether joint positioning is feasible. This preliminary action prevents unnecessary processing time from being spent on joint positioning when the Uu link quality is insufficient, thereby improving positioning reliability only when appropriate while minimizing processing time overhead.
Data Source
AI summary
A method for performing wireless communication by a first device and a device supporting same are provided. The method may comprise the steps of: obtaining configuration information related to a positioning reference signal (PRS) for Uu link-based positioning; obtaining configuration information related to an SL PRS for sidelink (SL)-based positioning; and performing joint positioning on the basis of the PRS and the SL PRS, wherein whether to perform the joint positioning is determined on the basis of a first RSRP value related to a signal received from a base station or a transmission and reception point (TRP).