Network Node Satellite Positioning for UE Location Despite Propagation Delays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In non-terrestrial networks, determining the location of user equipment (UE) is challenging due to the movement of satellites and significant propagation delays, which affect the accuracy of position estimation methods used in terrestrial networks.
Innovation Solution
A method involving a network node that receives measurement information from a satellite, obtains time and path information to determine the satellite's position, and uses this data to accurately calculate the UE's location, accounting for propagation delays and satellite movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If terrestrial network positioning methods are used in non-terrestrial networks, then positioning can be performed, but positioning accuracy deteriorates due to satellite movement and propagation delays
Solution Approach 1:
The patent changes the parameter of time synchronization by introducing time information that indicates the time at which the measurement was performed at the satellite. This time parameter is used to calculate the satellite's position at the measurement moment, thereby compensating for satellite movement and propagation delays to maintain positioning accuracy in non-terrestrial networks
Solution Approach 2:
The patent performs preliminary action by obtaining path information that indicates a path of the satellite before the measurement is performed. This allows the system to pre-calculate or prepare the satellite's position trajectory, enabling accurate position determination at the measurement time despite satellite movement and propagation effects
2Measurement precision
If satellite movement is not accounted for in positioning, then positioning calculation is simpler, but positioning accuracy deteriorates
Solution Approach 1:
The patent introduces time information as an intermediary parameter between the measurement and the satellite's position. This time information acts as a mediator that links the measurement moment to the satellite's position at that specific moment, allowing the system to account for satellite movement without requiring complex real-time trajectory calculations
Solution Approach 2:
The patent obtains path information indicating the satellite's path in advance, which simplifies the positioning calculation by providing pre-computed trajectory data. This preliminary preparation allows the system to directly determine the satellite's position at the measurement time without performing complex real-time calculations
3Measurement precision
If propagation delays are not compensated, then positioning calculation is faster, but positioning accuracy deteriorates
Solution Approach 1:
The patent performs preliminary action by obtaining path information that indicates the satellite's path before the measurement is performed. This pre-obtained path information allows the system to quickly determine the satellite's position at the measurement moment without performing complex real-time calculations, thus compensating for propagation delays while minimizing time loss
4Measurement precision
If measurement time is not synchronized with satellite position, then positioning is easier, but positioning accuracy deteriorates
Solution Approach 1:
The patent changes the parameter of time synchronization by introducing time information that indicates the time at which the measurement was performed at the satellite. This time parameter is used to calculate the satellite's position at the measurement moment, thereby synchronizing the measurement time with the satellite's position without requiring complex synchronization mechanisms
Data Source
AI summary
The present disclosure relates to a method performed by a first network node in a network comprising a non-terrestrial network portion, the method comprising: receiving measurement information corresponding to a measurement of a user equipment, UE, via a satellite (5) of the non-terrestrial network portion; receiving assistance information for determining a position of the satellite; determining, using the assistance information, a position of the satellite; and determining a location of the UE based on the position of the satellite and the measurement information.