Wireless Positioning Using Dynamic PRS Resource Selection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in accurately measuring the location of user equipment (UE) in environments using narrow beams, where the direction of received beams is not always line of sight (LoS), affecting the reliability and accuracy of time of arrival (ToA) measurements.
Innovation Solution
A positioning method that includes beam information, such as positioning reference signal (PRS) resource information and/or PRS resource set information, in reference configuration information for observed time difference of arrival (OTDOA) measurements, allowing the UE to select suitable PRS resources and report information on these selections for accurate location measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If narrow beams are used for positioning reference signals, then directional coverage and signal strength are improved, but measurement accuracy deteriorates when beams are not in line of sight
Solution Approach 1:
The patent makes the positioning reference signal configuration dynamic by allowing UE to select from multiple PRS resources and resource sets based on beam direction and LoS conditions. The network can dynamically configure different PRS resources for different beam directions, enabling the system to adapt to changing propagation conditions and maintain measurement accuracy.
Solution Approach 2:
The patent changes the parameter of PRS configuration by introducing multiple PRS resources and resource sets with different beam directions. The UE selects appropriate PRS resources based on measured beam qualities and LoS determinations, effectively changing the signal parameters to match current propagation conditions.
2Measurement precision
If multiple PRS resources are configured for different beam directions, then positioning accuracy in non-LoS environments is improved, but system complexity increases
Solution Approach 1:
The patent segments the positioning reference signal configuration into multiple PRS resources and resource sets, each associated with specific beam directions. This segmentation allows the UE to selectively use only the relevant PRS resources for its current position and beam conditions, managing complexity through structured organization.
Solution Approach 2:
The UE performs self-selection of appropriate PRS resources based on its own measurements of beam directions and LoS conditions. The UE autonomously determines which PRS resources to use for RSTD measurements without requiring complex network control, reducing overall system complexity while maintaining accuracy.
3Reliability
If UE selects PRS resources based on beam quality, then ToA measurement reliability is improved, but processing time and complexity at UE increase
Solution Approach 1:
The network pre-configures multiple PRS resources and resource sets with different beam directions before the UE needs to perform positioning measurements. The UE can then quickly select from these pre-configured options based on real-time beam quality measurements, reducing processing time compared to configuring resources on-demand.
Data Source
AI summary
Disclosed in various embodiments of the present disclosure are a method for positioning in a wireless communication system, and a device for supporting same.