Adaptive Positioning Reference Signal Configuration for Mobility
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Solution Overview
Problem
Current wireless communication systems face challenges in accurately determining the position of user equipment (UE) in wireless networks, particularly for fast-moving UEs, due to the impact of mobility on positioning accuracy and the need for efficient resource utilization.
Innovation Solution
The proposed solution involves the UE transmitting mobility status information to a location management node (LMF) before positioning measurements. The LMF then configures appropriate positioning reference signal configurations and measurement settings based on the mobility status, allowing the UE and network nodes to perform optimized positioning measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If positioning measurements are performed using standard configurations, then positioning functionality is provided, but positioning accuracy deteriorates for fast-moving UEs due to mobility impact
Solution Approach 1:
The patent applies dynamics by making the positioning configuration adaptive to UE mobility conditions. The LMF determines positioning reference signal configurations and measurement settings based on received mobility status information, allowing the system to dynamically adjust parameters such as measurement timing configurations and reference signal resource settings to match the UE's mobility state, thereby maintaining positioning accuracy for fast-moving UEs
Solution Approach 2:
The patent changes positioning parameters based on mobility status. The LMF modifies positioning reference signal configurations (e.g., periodicity, bandwidth, resource allocation) and measurement settings (e.g., measurement timing windows, reporting configurations) according to the UE's mobility characteristics, optimizing positioning performance for different mobility scenarios
2Measurement precision
If optimized positioning configurations are used for fast-moving UEs, then positioning accuracy improves, but resource usage increases
Solution Approach 1:
The patent applies local quality by providing differentiated positioning configurations tailored to specific UE mobility conditions. Instead of using uniform optimized configurations for all UEs, the LMF determines appropriate positioning reference signal configurations and measurement settings based on each UE's individual mobility status information, applying resource-intensive configurations only where necessary for fast-moving UEs while using standard configurations for stationary or slow-moving UEs
Solution Approach 2:
The patent uses partial action by applying enhanced positioning measurements only when needed. The LMF evaluates mobility status information and selectively configures optimized positioning parameters only for UEs that require them, rather than applying resource-intensive configurations universally, thus balancing positioning accuracy requirements with resource efficiency
3Measurement precision
If mobility status information is transmitted and evaluated, then positioning accuracy improves, but system complexity increases
Solution Approach 1:
The patent applies preliminary action by having the UE transmit mobility status information to the LMF before positioning measurements are performed. This allows the LMF to determine appropriate positioning configurations in advance, based on the UE's mobility characteristics, ensuring that optimized measurements are configured appropriately before execution, thereby improving positioning accuracy without requiring complex real-time adjustments during measurement
Data Source
AI summary
Determining positioning of a UE in a network includes the UE transmitting mobility status information to a LMF. A wireless network broadcasts configuration parameters for a set of mobility indicators. A receiving UE evaluates the configuration parameters and derives mobility status information, which the UE reports to the LMF. The LMF then determines positioning frequency layer and positioning reference signal configurations on DL (PRS) and UL (SRS). The LMF then sends the positioning frequency layer and reference signal configurations for DL and/or UL and positioning measurement and reporting configurations to the UE, its serving gNB and configured neighbour gNBs. The UE and gNB(s) then perform positioning measurements according to the positioning reference signal configurations for DL and/or UL and according positioning measurement and reporting configurations and report the positioning measurements to the LMF to determine the UE's position in the wireless network.