Sidelink Positioning Reference Signals for Out-of-Coverage Accuracy
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Solution Overview
Problem
Existing wireless communication systems face challenges in improving the accuracy of sidelink (SL) positioning, particularly in scenarios where network-based positioning methods are unavailable or less effective.
Innovation Solution
Implementing a method where UEs transmit and receive accuracy level information and SL positioning reference signals (PRS) based on predefined or configured positioning accuracy levels, with priority rules for selecting the most accurate SL PRS transmission UE, and using resource pools associated with these levels to enhance SL positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If SL positioning is implemented without network-based positioning support, then positioning independence and availability are improved, but positioning accuracy deteriorates
Solution Approach 1:
The patent segments the positioning system into multiple UEs that can independently perform positioning functions. Each UE can act as both a positioning target and a positioning assistant, dividing the positioning task across multiple devices rather than relying on a centralized network infrastructure. This segmentation enables positioning independence while maintaining accuracy through distributed measurement and calculation.
Solution Approach 2:
The patent changes the parameter of positioning reference signal transmission by introducing accuracy level information that indicates different positioning accuracy levels. The transmission UE selects appropriate SL PRS resources based on its positioning accuracy level, allowing the system to adaptively provide different accuracy levels depending on network coverage conditions and application requirements.
2Measurement precision
If multiple SL PRS transmission UEs are used to improve positioning accuracy, then positioning accuracy is improved, but device complexity and resource management deteriorate
Solution Approach 1:
The patent introduces dynamic resource pool configuration where resource pools are associated with different positioning accuracy levels. The transmission UE dynamically selects which resource pool to use based on its current positioning accuracy level and the requirements of the reception UE. This dynamic approach allows multiple UEs to transmit SL PRS with different accuracy levels while maintaining organized resource management through predefined accuracy-level-based resource allocation.
Solution Approach 2:
The patent creates multiple copies of positioning reference signals from different transmission UEs, each with associated accuracy level information. The reception UE receives SL PRS from multiple transmission UEs and can select or combine these copies based on the accuracy level information provided, enabling improved positioning accuracy through multiple sources while maintaining manageable complexity through standardized accuracy level indicators.
3Ease of manufacture
If SL PRS transmission resources are allocated without accuracy level differentiation, then resource allocation simplicity is maintained, but positioning accuracy differentiation and optimization deteriorate
Solution Approach 1:
The patent applies local quality by associating different resource pools with different positioning accuracy levels. Instead of treating all SL PRS resources uniformly, the system creates localized resource allocations tailored to specific accuracy requirements. Each resource pool is optimized for its designated accuracy level, allowing the system to maintain relative simplicity through predefined associations while enabling accuracy differentiation when needed.
Data Source
AI summary
Embodiments of the present application relate to a method and apparatus of sidelink (SL) positioning. An exemplary UE includes: at least one receiving circuitry; at least one transmitting circuitry; and at least one processor coupled to the at least one receiving circuitry and the at least one transmitting circuitry, wherein the at least one processor is configured to: transmit accuracy level information indicating a positioning accuracy level associated with the UE to a set of reception UE; and transmit an SL PRS corresponding to the accuracy level information to a reception UE, wherein the reception UE is one of the set of reception UE or not.