Sidelink Positioning Reference Signal Processing for UE-to-UE Relative Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems do not support UE-to-UE range and orientation determinations, which are essential for relative positioning applications such as vehicle-to-everything (V2X), public safety, and industrial Internet of things (IIoT).
Innovation Solution
The implementation of sidelink positioning reference signal (PRS) processing techniques, which enable network entities and sidelink devices to process sidelink PRS signals independently and in conjunction with Uu interface PRS signals, facilitating relative positioning and orientation determinations between UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UE-to-UE range and orientation determinations are not supported, then the system maintains simpler architecture, but relative positioning applications cannot be implemented
Solution Approach 1:
The patent segments the positioning functionality by introducing dedicated sidelink positioning reference signals (SL-PRS) that operate independently from traditional Uu interface positioning. This allows UE-to-UE positioning to be implemented as a separate, modular capability rather than requiring complete system redesign, thus enabling relative positioning applications while maintaining manageable system complexity.
Solution Approach 2:
The patent makes the positioning system universal by enabling UEs to perform multiple positioning functions: both traditional network-based Uu interface positioning and direct UE-to-UE sidelink positioning. The same UE infrastructure supports both positioning modes, allowing the system to adapt to different application requirements (absolute positioning, relative positioning, orientation determination) without requiring separate dedicated systems.
2Measurement precision
If sidelink PRS processing is added to existing systems, then positioning accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent implements self-service by enabling UEs to autonomously process sidelink positioning reference signals and perform positioning calculations without requiring complex network-based processing assistance. The UE independently measures SL-PRS from other UEs, performs time difference of arrival (TDOA) or received signal strength (RSS) calculations, and determines its own position and orientation, reducing the processing burden on network infrastructure while improving measurement precision.
3Reliability
If joint processing of Uu and sidelink PRS is enabled, then positioning reliability is improved, but device processing requirements increase
Solution Approach 1:
The patent merges two positioning systems (Uu interface and sidelink) into a unified positioning framework. The UE simultaneously processes positioning reference signals from both the network (Uu) and other UEs (sidelink), combining measurements to improve positioning reliability. This integration allows the system to leverage multiple signal sources and measurement techniques, providing more robust and accurate positioning determinations while distributing processing requirements across the UE's existing capabilities.
Data Source
AI summary
Various aspects of the disclosure relate to sidelink positioning reference signal (PRS) processing. A configuring device transmits a request message requesting sidelink PRS processing capability of a responding device, and receive a response message indicating the sidelink PRS processing capability. The configuring device can configure a sidelink PRS configuration indicating a duration and priority associated with processing a sidelink PRS with respect to an additional sidelink signal received by the responding device, and transmit the sidelink PRS configuration to the responding device. The responding device can receive the request message to indicate the sidelink PRS processing capability of the device, and transmit the response message indicating the sidelink PRS processing capability. The responding device can receive the sidelink PRS configuration indicating the duration and priority associated with processing the sidelink PRS with respect to the additional sidelink signal, and process the sidelink PRS based on the received sidelink PRS configuration.