Sidelink Localization Coordination for Coverage-Limited Positioning
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Solution Overview
Problem
There is a need to improve sidelink positioning in 5G/New Radio (NR) wireless communication systems for relative and absolute positioning, particularly in areas with reduced or no core network coverage, while maintaining data integrity and user experience.
Innovation Solution
A user equipment (UE) device performs sidelink (SL) localization procedures using SL-TDOA, SL-AoA/AoD, and SL-Group ID measurements, coordinating with neighboring terminals to calculate positioning information through shared reference and synchronization signals, allocating resources without impacting data communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sidelink localization procedures are implemented in areas with reduced or no core network coverage, then positioning capability is improved, but system complexity increases
Solution Approach 1:
The patent implements self-service by enabling UE devices to autonomously perform localization measurements and calculations using sidelink communications with neighboring UEs. The system determines positioning information independently without requiring core network infrastructure, with UEs serving themselves and each other as positioning references through shared reference signals and synchronization procedures
Solution Approach 2:
The patent uses neighboring UE devices as intermediaries to enable positioning in areas without core network coverage. These intermediate UEs relay reference signals and synchronization information, allowing the target UE to perform TDOA, AoA/AoD, and Group ID measurements indirectly through the intermediary UEs rather than requiring direct network infrastructure
2Measurement precision
If resource allocation is performed for SL transmission procedure, then positioning accuracy is improved, but data communication may be impacted
Solution Approach 1:
The patent segments resource allocation by dedicating specific time-frequency resources exclusively for sidelink localization procedures. Configuration parameters allocate separate reference signal resources, synchronization signal resources, and measurement resources distinct from data communication resources, ensuring positioning measurements do not interfere with data transmission
Solution Approach 2:
The patent implements periodic action by scheduling reference signals and synchronization signals at regular intervals dedicated to positioning. The configuration parameters establish periodic transmission patterns for SL-PRS and synchronization signals, allowing positioning measurements to occur periodically without continuously occupying data communication resources
Data Source
AI summary
A first terminal may include a receiver that receives, from a second terminal, configuration parameters for a Sidelink (SL) localization procedure in which positioning information of the first terminal is obtained. Further, the first terminal may include a processor configured to determine, based on the configuration parameters, reference information and synchronization information to be used in a SL transmission procedure to obtain the positioning information.