NTN UE Position Reporting with Configurable RRC Periodicity
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Solution Overview
Problem
Existing wireless communication systems lack efficient mechanisms for UEs in non-terrestrial networks (NTN) to determine and report their position, leading to battery drain, inaccurate position reporting, and excessive signaling, which affects operations such as timing advance, synchronization, and handover.
Innovation Solution
The system introduces enhanced methods for UEs to determine and report their position based on GNSS observations, using transformed coordinates and incremental reporting, with configurable periodicity and signaling mechanisms tailored to RRC states, reducing unnecessary calculations and conserving battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE continuously determines and reports its position using GNSS in NTN, then position accuracy is improved, but battery consumption increases
Solution Approach 1:
The patent implements periodic position reporting where the UE determines its position at configured intervals rather than continuously. The network configures positioning periodicity through RRC signaling, allowing the UE to enter low-power states between positioning measurements while still maintaining acceptable position accuracy for network operations.
Solution Approach 2:
The patent dynamically adjusts positioning parameters including reporting periodicity, position accuracy thresholds, and calculation intensity based on network conditions and UE state. When position accuracy requirements are relaxed or conditions are stable, the UE reduces calculation frequency and complexity, thereby conserving battery energy while maintaining sufficient positioning capability.
2Measurement precision
If the UE performs frequent position calculations and reporting, then position accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent implements dynamic adjustment of reporting parameters where the network configures different reporting periodicities and accuracy thresholds based on operational needs. The UE adapts its position reporting frequency and detail level according to these parameters, reducing unnecessary signaling when high accuracy is not required while maintaining accuracy when needed.
Solution Approach 2:
The network provides feedback to the UE regarding position accuracy requirements and reporting configurations through RRC signaling. Based on this feedback, the UE adjusts its position determination and reporting behavior, ensuring that signaling overhead matches actual network needs rather than operating at maximum frequency regardless of conditions.
3Measurement precision
If the UE reports detailed position information frequently, then network operation accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent implements configurable position reporting parameters that allow the network to adjust the level of detail and frequency of position information based on operational requirements. The UE processes and reports position information at varying levels of complexity depending on these parameters, reducing processing burden when full detail is not necessary while maintaining high accuracy when required.
Data Source
AI summary
Methods and apparatuses for reporting UE location information in a wireless communication system. A method of operating a UE comprises: receiving, from a base station (BS) in a non-terrestrial network (NTN), a message requesting to report the UE location information; generating, based on a positioning operation, first UE location information; generating second UE location information that is derived from the first UE location information; and transmitting, to the BS, the second UE location information as the UE location information.