PRS Transmitter Prioritization for Faster, Accurate UE Positioning
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Solution Overview
Problem
Existing wireless communications systems face inefficiencies in determining reliable position information and selecting appropriate positioning reference signal (PRS) transmitters for accurate UE positioning, leading to reduced accuracy and increased signaling overhead.
Innovation Solution
The method involves prioritizing PRS transmitters based on criteria such as priority and reliability information, selecting a subset of transmitters, and using them for position measurements, while excluding others to generate a position measurement report.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple PRS transmitters are used for positioning measurements, then positioning accuracy is improved, but signaling overhead and device resource usage increase
Solution Approach 1:
The patent segments the set of available PRS transmitters into prioritized groups, where the network or UE identifies and selects only the most relevant subset of transmitters for positioning measurements. This segmentation reduces the number of transmitters that need to be processed and reported, thereby reducing signaling overhead while maintaining positioning accuracy using only the most reliable transmitters.
Solution Approach 2:
The patent introduces priority parameters and reliability information associated with each PRS transmitter. By changing the selection criterion from using all transmitters to selecting based on priority parameters, the system optimizes the balance between positioning accuracy and signaling overhead. The network can configure priority levels and the UE can filter transmitters based on these parameters.
2Reliability
If multiple PRS transmitters are evaluated for positioning, then positioning reliability is improved, but device processing resources increase
Solution Approach 1:
The patent segments the evaluation process by prioritizing PRS transmitters before measurement. The network or UE identifies a subset of high-priority transmitters, and the device only performs detailed evaluation and measurements on this reduced set. This segmentation maintains positioning reliability by focusing on the most reliable transmitters while reducing device processing resources by excluding lower-priority transmitters from intensive evaluation.
Solution Approach 2:
The patent applies preliminary prioritization of PRS transmitters before the actual positioning measurement process. The network can pre-configure priority information or the UE can perform initial filtering based on available information. This preliminary action reduces the number of transmitters that require full processing, thereby reducing device complexity while ensuring that the most reliable transmitters are evaluated for positioning.
3Measurement precision
If all available PRS transmitters are used for positioning, then positioning accuracy is improved, but the time required for position determination increases
Solution Approach 1:
The patent segments the set of PRS transmitters into prioritized groups, allowing the UE to focus measurements on the most relevant subset. By processing only high-priority transmitters first, the system achieves positioning accuracy with fewer measurements, thereby reducing the time required for position determination while maintaining reliability.
Solution Approach 2:
The patent enables the UE to skip evaluation and measurement of low-priority PRS transmitters when high-priority transmitters are sufficient for achieving the required positioning accuracy. This skipping mechanism reduces the time required for position determination by avoiding unnecessary processing of transmitters that would not significantly contribute to the positioning result.
Data Source
AI summary
Various aspects of the present disclosure relate to methods, apparatuses, and systems that priority for position information. For instance, when multiple positioning reference signal (PRS) transmitters are available or could be made available for a target UE that is to perform positioning measurements, the target UE can prioritize the PRS transmitters according to one or more criteria. Accordingly, a target UE can select a set of one or more PRS transmitters based on one or more specified criteria and can utilize PRS from the selected PRS transmitter(s) to determine location information of the target UE.