Multi-Reference UE Localization for Low-Latency 5G Ranging
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Solution Overview
Problem
Existing 5G networks face challenges in accurately localizing and ranging user equipment (UEs) for enhanced Location Services (eLCS) and ranging-based services, particularly in dense indoor or urban environments with high latency requirements.
Innovation Solution
A method and network that utilize multiple reference UEs to provide simultaneous location and range measurements to a Location Management Function (LMF), enabling improved localization and ranging of target UEs through enhanced processing capabilities to combine and select the best measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple reference UEs are used for simultaneous measurements, then localization and ranging accuracy is improved, but device complexity and network processing requirements increase
Solution Approach 1:
The patent segments the localization task by assigning multiple reference UEs (at least three) to simultaneously measure different aspects of the target UE's position and range. Each reference UE provides independent measurement data, dividing the complex localization problem into multiple parallel measurement sub-tasks that can be processed independently before being combined by the LMF.
Solution Approach 2:
The patent transitions from traditional single-reference-point localization to a multi-dimensional approach by utilizing spatial distribution of multiple reference UEs. This creates a three-dimensional measurement framework where measurements from different spatial positions are combined to achieve more accurate 3D localization and ranging.
2Loss of time
If multiple reference UEs provide simultaneous measurements, then latency is reduced for URLLC applications, but network signaling overhead and processing load increase
Solution Approach 1:
The patent implements preliminary action by having reference UEs continuously maintain measurement capabilities and readiness states in advance. The LMF can trigger simultaneous measurements across multiple reference UEs, and since they are already prepared, the measurements can be completed rapidly without sequential delays, reducing overall localization latency.
Solution Approach 2:
The patent ensures continuity of useful action by maintaining measurement processes across multiple reference UEs simultaneously rather than sequentially. This parallel continuous measurement approach eliminates waiting time between measurements from different reference points, achieving low-latency localization critical for URLLC applications.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method of localizing and/or ranging user equipment, UE, in a network, for example a 5G network, including a target UE and a plurality of UEs, the method comprising: assigning, by the network for example by the Location Management Function (LMF) and/or the target UE, the plurality of UEs as multiple reference and/or located UEs; providing, by the multiple reference and/or located UEs to the network for example to the LMF, respective location/range related measurements (also known as location and/or range assistance data) of the target UE; and localizing and/or ranging, by the network for example by the LMF, the target UE using the provided respective location and/or range related measurements of the target UE.