DOP-Based Reference Signal Selection for NTN Positioning
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Solution Overview
Problem
Legacy designs for non-terrestrial network (NTN)-based position estimation do not consider the dilution of precision (DOP) of user equipment (UE), leading to inefficient transmission of reference signals, waste of radio resources, and increased power consumption.
Innovation Solution
Implementing DOP-based positioning assistance information to configure a reference signal (RS) configuration for NTN-based position estimation, selecting a subset of RSs based on DOP to improve accuracy and reduce resource waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all reference signals are transmitted for NTN-based position estimation, then position estimation can be performed, but radio resources are wasted and power consumption increases
Solution Approach 1:
The patent extracts and transmits only the necessary subset of reference signals based on DOP criteria, removing unnecessary signals from the transmission set. This reduces the number of reference signals transmitted while maintaining position estimation accuracy, thereby reducing power consumption and radio resource usage.
Solution Approach 2:
The patent changes the parameter of reference signal selection by introducing DOP-based filtering. Instead of transmitting all available reference signals, the system evaluates each signal's DOP parameter and selectively transmits only those that meet the accuracy threshold, optimizing the balance between position estimation accuracy and resource consumption.
2Measurement precision
If all reference signals are transmitted for NTN-based position estimation, then position estimation can be performed, but spectral efficiency deteriorates
Solution Approach 1:
The patent extracts and transmits only the necessary subset of reference signals based on DOP criteria, removing unnecessary signals from the transmission set. This reduces the number of reference signals transmitted while maintaining position estimation accuracy, thereby improving spectral efficiency by reducing resource waste.
Solution Approach 2:
The patent applies partial action by transmitting only the minimum necessary reference signals required for accurate position estimation. By sending fewer signals than the total available set, the system achieves the required positioning accuracy while improving spectral efficiency and reducing resource consumption.
3Measurement precision
If DOP-based positioning assistance information is implemented, then position estimation accuracy and spectral efficiency are improved, but device complexity increases
Solution Approach 1:
The patent performs preliminary calculation of DOP values for all candidate reference signals before transmission. By pre-evaluating the geometric quality of each signal and identifying the optimal subset in advance, the system reduces the complexity of real-time processing while ensuring accurate position estimation with the selected signals.
Data Source
AI summary
Aspects of the disclosure are directed to communication of dilution of precision (DOP)-based positioning assistance information associated with a non-terrestrial network (NTN) communication session. In an aspect, the DOP-based positioning assistance information is utilized to configure a reference signal (RS) configuration for the NTN-based position estimation session. Such aspects may provide various technical advantages, such as improved position estimation accuracy, reduced position estimation latency, reduced power consumption at the UE and/or at NTN entities (e.g., satellites), improved spectral efficiency, and so on.