Sidelink Positioning Switching Between RTT and Single-Sided Methods
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Solution Overview
Problem
Current sidelink positioning technologies face challenges in determining the optimal positioning method between Round-Trip Time (RTT)-based and Single-Sided (SS)-based positioning for accurate vehicle-to-everything (V2X) communications, particularly in scenarios where angular changes, sensor accuracy, and oscillator synchronization are critical, leading to potential inaccuracies and inefficiencies.
Innovation Solution
The proposed solution enables sidelink-enabled devices to switch between RTT-based and SS-based positioning by identifying specific criteria, such as angular changes, sensor variance, and oscillator synchronization, using existing ITS message formats to select the appropriate positioning method, thereby optimizing positioning accuracy and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RTT-based positioning is used, then positioning accuracy is improved, but power consumption and bandwidth usage increase
Solution Approach 1:
The system dynamically switches between RTT-based and SS-based positioning methods based on real-time criteria evaluation. The source node continuously monitors angular changes, sensor variance, and oscillator synchronization status, and adapts the positioning method accordingly, making the system flexible and condition-dependent rather than static
Solution Approach 2:
The invention changes the operational parameters of the positioning system by switching between two distinct positioning modes (RTT and SS) based on evaluated criteria. When criteria such as angular changes exceed thresholds or oscillator synchronization degrades, the system transitions from RTT to SS positioning, effectively changing the system's operational state to optimize performance
2Measurement precision
If RTT-based positioning is used, then positioning accuracy is improved, but bandwidth usage increases
Solution Approach 1:
The system dynamically adjusts bandwidth consumption by switching positioning methods based on real-time conditions. When RTT positioning is not strictly necessary (based on criteria evaluation), the system transitions to SS positioning, thereby dynamically reducing bandwidth usage while maintaining adequate positioning functionality
Solution Approach 2:
The invention changes the bandwidth consumption parameter by selecting different positioning modes. RTT-based positioning uses more bandwidth due to round-trip signal exchanges, while SS-based positioning uses less. The system changes this parameter based on evaluated criteria such as angular changes and sensor variance
3Use of energy by moving object
If SS-based positioning is used, then power consumption and bandwidth usage are reduced, but positioning accuracy decreases
Solution Approach 1:
The system dynamically selects the positioning method based on real-time criteria. When conditions favor SS positioning (small angular changes, low sensor variance, good oscillator synchronization), the system uses SS positioning to save power. When conditions degrade (large angular changes, high sensor variance, poor synchronization), the system switches to RTT positioning to maintain accuracy
Solution Approach 2:
The invention changes the positioning accuracy parameter by switching between positioning modes. SS positioning provides lower accuracy but lower power consumption, while RTT positioning provides higher accuracy but higher power consumption. The system changes this parameter based on evaluated criteria to optimize the trade-off
4Reliability
If positioning method switching is implemented, then positioning optimization is improved, but device complexity increases
Solution Approach 1:
The invention segments the positioning decision-making process into distinct evaluable criteria: angular changes, sensor variance, and oscillator synchronization status. Each criterion is evaluated independently against predefined thresholds, and the combination of these segmented evaluations determines the positioning method selection, making the complex decision process more manageable and systematic
Solution Approach 2:
The source node performs multiple functions: it acts as a positioning initiator, a criteria evaluator, a method selector, and a message communicator. By consolidating these functions in a single node, the invention reduces overall system complexity while achieving intelligent positioning optimization through multi-functional integration
Data Source
AI summary
Systems, methods, and devices for sidelink positioning determination and communication can employ techniques including obtaining, at a first sidelink-enabled device, data from one or more data sources indicative of one or more criteria for using either round-trip time (RTT)-based positioning of a target node or single-sided (SS)-based positioning of the target node. The techniques also include selecting, with the first sidelink-enabled device, a positioning type from the group may comprise of RTT-based positioning and SS-based positioning, based on the data. The techniques also include sending a message from the first sidelink-enabled device to a second sidelink-enabled device, where the message includes information indicative of the selected positioning type.