Sidelink Positioning Reference Signal Configuration
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Solution Overview
Problem
Current vehicle positioning technologies face challenges in achieving high accuracy and low latency, especially for medium to short-range positioning, and require geometric information for safe autonomous driving, while existing methods incur significant signaling overhead in implementing efficient multiple-node user equipment (UE) positioning.
Innovation Solution
The method involves receiving configuration information for sidelink positioning, which includes panel patterns, resource allocation principles, and beam allocation principles, to efficiently transmit sidelink positioning reference signals (SL-PRS) with reduced signaling overhead, allowing for accurate location and orientation estimation of UE.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If general positioning technologies are used for medium to short-range vehicle positioning, then positioning can be achieved, but positioning accuracy is insufficient and geometric information cannot be obtained
Solution Approach 1:
The patent divides the vehicle into multiple antenna panels distributed at different spatial locations. Each panel independently transmits and receives positioning signals, enabling the system to capture geometric information about the vehicle's size, shape, and orientation. This segmentation transforms a single-point positioning problem into a multi-point spatial positioning problem, achieving both high accuracy and reliable geometric information extraction.
2Productivity
If multiple-node UE positioning is implemented with detailed configuration information, then positioning efficiency improves, but signaling overhead increases
Solution Approach 1:
The patent introduces pre-configured panel pattern templates that define typical antenna panel arrangements (e.g., front panel, rear panel, side panels). Instead of transmitting complete panel configuration details for each positioning session, the system references these pre-defined templates. The transmitting UE indicates which template to use and provides only necessary deviations, dramatically reducing signaling overhead while maintaining positioning efficiency.
Solution Approach 2:
Panel pattern configurations are pre-established and stored in both transmitting and receiving UEs before positioning operations begin. These pre-configurations include typical panel geometries, orientations, and spatial relationships. During actual positioning, UEs simply reference these pre-prepared configurations rather than exchanging complete configuration data, enabling fast positioning with minimal signaling.
3Loss of information
If antenna panels are distributed across the vehicle body, then geometric information can be obtained, but device complexity increases
Solution Approach 1:
The patent designs antenna panels with multi-functionality, where each panel can serve both communication functions (data transmission) and positioning functions (geometric information extraction). The same physical antenna structures are used for both purposes, eliminating the need for separate dedicated positioning antenna systems and reducing overall device complexity while still capturing comprehensive geometric information.
Solution Approach 2:
The patent employs identical or similar antenna panel designs distributed throughout the vehicle. Each panel follows the same structural and operational characteristics, simplifying the overall system architecture. This homogeneity allows the system to process signals from multiple panels using unified algorithms, reducing computational complexity while still enabling accurate reconstruction of the vehicle's geometric properties through the spatial distribution of identical elements.
Data Source
AI summary
Embodiments of the present application relate to methods and apparatuses for sidelink (SL) positioning. According to an embodiment of the present application, a method may include: receiving configuration information for SL positioning, wherein the configuration information for SL positioning includes at least one of: configuration of at least one panel pattern, wherein each panel pattern of the at least one panel pattern includes one or more panels; at least one resource allocation principle associated with the at least one panel pattern; and at least one beam allocation principle associated with the at least one panel pattern; and transmitting an SL positioning reference signal (SL-PRS) according to the received configuration information for SL positioning. Embodiments of the present application can support more efficient multiple-node UE positioning with low signaling overhead.