RAT-Dependent Positioning Integrity Using UE Assistance Data
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Solution Overview
Problem
Existing wireless communication systems lack integrity support for radio access technology (RAT)-dependent positioning, which affects the trust in position accuracy and the ability to provide timely warnings when positioning systems fail to meet operational conditions.
Innovation Solution
Incorporating integrity assistance data, including error sources and UE-assisted information, into the positioning process through methods and apparatuses that enable transmission between user equipment (UE), radio access network (RAN) nodes, and a location management function (LMF) to determine a reliable RAT-dependent positioning method.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If integrity assistance data is collected and transmitted from UE to LMF, then positioning integrity is improved, but device complexity and data transmission overhead increase
Solution Approach 1:
The integrity assistance data is segmented into multiple types including error source information, UE-assisted information, and predicted integrity assistance information. This segmentation allows the system to process and transmit only the necessary portions of data, reducing overall complexity while maintaining positioning integrity.
Solution Approach 2:
The system performs preliminary actions by collecting and processing integrity assistance data before the actual positioning operation. The UE-assisted information is prepared in advance, and predicted integrity assistance information is generated proactively, allowing the LMF to make informed positioning method selections without increasing real-time processing complexity.
2Reliability
If multiple types of integrity assistance data are transmitted, then positioning reliability is improved, but information transmission overhead increases
Solution Approach 1:
Different types of integrity assistance data are transmitted based on the specific positioning scenario and requirements. The system selectively transmits relevant data types (error source information, UE-assisted information, or predicted integrity assistance information) rather than always transmitting all possible data, reducing unnecessary overhead while maintaining reliability.
Solution Approach 2:
The system establishes a feedback mechanism where the LMF receives integrity assistance data from the UE, processes it, and provides positioning method selections. The UE can then provide feedback on the suitability of selected methods, allowing for iterative optimization and reducing the need to transmit all data types repeatedly.
3Measurement precision
If integrity assistance data is processed in real-time, then positioning accuracy is improved, but processing time and system response delay increase
Solution Approach 1:
The system performs preliminary processing of integrity assistance data before the actual positioning calculation. The UE prepares UE-assisted information in advance, and the network generates predicted integrity assistance information proactively. This allows the LMF to receive pre-processed data during positioning operations, reducing real-time processing time while maintaining accuracy.
Solution Approach 2:
The system dynamically adjusts the level of processing based on the specific positioning scenario and available data. The LMF can select different positioning methods depending on the type and quality of integrity assistance data received, allowing for flexible processing that optimizes between accuracy and processing time based on current conditions.
Data Source
AI summary
Embodiments of the present disclosure relate to methods and apparatuses for radio access technology (RAT) dependent positioning integrity. According to an embodiment of the present disclosure, a user equipment (UE) may include: a processor configured to obtain integrity assistance data of the UE; a transmitter coupled to the processor and configured to transmit the integrity assistance data of the UE to a location management function (LMF); and a receiver coupled to the processor.