Sidelink Positioning Reference Signal Resource Allocation
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Solution Overview
Problem
Current wireless communication systems face challenges in effectively performing positioning (location measurement) in scenarios where user equipment (UE) is outside the coverage of a base station, especially in sidelink communications.
Innovation Solution
The proposed method involves a UE receiving sidelink control information (SCI) that includes an SCI format field for a sidelink positioning reference signal (PRS). If the SCI format field indicates a PRS format for a shared sidelink PRS resource pool, the UE receives the corresponding SCI and PRS on a physical sidelink shared channel based on the SCI format.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If positioning is performed using traditional base station coverage methods, then positioning accuracy is maintained within coverage areas, but positioning capability is lost outside base station coverage
Solution Approach 1:
The patent introduces sidelink positioning reference signals as an intermediary mechanism that enables positioning between user equipment outside base station coverage. The first UE transmits SL-PRS signals that the second UE receives and processes to calculate positioning information, effectively creating a mediator-based positioning system that operates independently of base station coverage.
Solution Approach 2:
The patent segments the positioning function into distributed user equipment units that can perform positioning measurements autonomously. Instead of relying on a centralized base station for all positioning operations, the system divides positioning capabilities across multiple UEs, allowing them to cooperate in determining location information even when outside network coverage.
2Adaptability or versatility
If sidelink positioning reference signals are transmitted on physical sidelink shared channels, then positioning can be performed outside base station coverage, but signal interference and resource contention increase
Solution Approach 1:
The patent applies local quality by configuring specific resource pools dedicated to sidelink positioning reference signal transmissions. Instead of using general-purpose shared channels for all purposes, dedicated SL-PRS resource pools are established with specific time-frequency resources, reducing interference from other transmissions and improving positioning signal quality in localized contexts.
Solution Approach 2:
The system implements periodic transmission of sidelink positioning reference signals at configured intervals. This periodic action allows receiving UEs to accumulate measurement opportunities over time while maintaining predictable resource usage patterns, reducing random interference and enabling reliable positioning measurements even in shared spectrum environments.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a first UE in a wireless communication system is provided. The method includes receiving, from a second UE, first SCI on a PSCCH, the first SCI including an SCI format field for a second SCI, in case that the SCI format field includes a first value corresponding to an SCI format for an SL PRS for a shared SL PRS resource pool, receiving, from the second UE, the second SCI corresponding to the SCI format on a PSSCH, and receiving, from the second UE, the SL PRS on the PSSCH based on the second SCI.