Condensed Location Reporting for User Equipment in Non-Terrestrial Networks
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Solution Overview
Problem
Wireless communication systems face challenges in accurately determining the location of user equipment (UE) in non-terrestrial networks, particularly when the coverage area spans multiple countries, as existing methods are inefficient and may compromise privacy due to the need for precise location information.
Innovation Solution
The implementation of techniques such as using propagation delay, directional antennas, truncated geographic coordinates, coordinate differentials, timing advances, and angle information to approximate the UE's location, reducing the size of location data transmitted and preserving privacy during location determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If full global navigation satellite system coordinates are transmitted for UE location reporting, then location precision is improved, but data transmission overhead and privacy exposure increase
Solution Approach 1:
The patent extracts only the necessary portion of location information by reporting condensed location data (e.g., truncated coordinates or coordinate differentials) instead of full GNSS coordinates. This extraction approach maintains sufficient location precision for network operations while significantly reducing the amount of data transmitted, thereby resolving the contradiction between precision and data overhead.
Solution Approach 2:
The patent applies local quality by using different precision levels for different location reporting scenarios. Instead of uniformly transmitting full-precision coordinates in all cases, the system transmits condensed location information with appropriate precision for the specific network operation (e.g., beam management, handover), optimizing the balance between precision requirements and data transmission efficiency.
2Measurement precision
If full global navigation satellite system coordinates are transmitted for UE location reporting, then location precision is improved, but user privacy protection deteriorates
Solution Approach 1:
The patent extracts only the minimum necessary location information required for network operations by transmitting condensed location data rather than full GNSS coordinates. This extraction minimizes the exposure of sensitive user location information while maintaining sufficient precision for beam management, handover, and other network functions, thereby protecting user privacy.
3Productivity
If condensed location information with fewer bits is used, then data transmission efficiency is improved, but location determination accuracy may deteriorate
Solution Approach 1:
The patent changes the representation parameters of location information by using condensed formats such as truncated coordinates or coordinate differentials relative to a reference point. These parameter changes reduce the bit length of transmitted location data while maintaining sufficient accuracy for network operations through intelligent selection of the condensed format and reference point.
Solution Approach 2:
The patent applies partial action by transmitting only the essential portion of location information needed for specific network operations. Instead of transmitting complete high-precision coordinates, the system transmits condensed location data with sufficient precision for the at handover or beam management, achieving data transmission efficiency while maintaining adequate location determination accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
These methods enable efficient and accurate location determination of UE in non-terrestrial networks, facilitating beam management and core network access while minimizing the transmission of sensitive location data, thus improving network performance and user privacy.
Implementation Method 1
a base station may determine the approximate location of a UE by using the propagation delay between the UE and the base station
Implementation Method 2
the base station may determine the approximate location of the UE by using a directional antenna to scan for uplink reference signals from the UE
Implementation Method 3
the base station may determine the location of the UE based on a timing advance for the UE and an angle of the UE relative to a reference line
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A base station may request a user equipment (UE) to report location information for the UE using a specific format. The UE may report the location information to the base station based on the request. The base station may use the location information reported by the UE to determine the location of the UE.