Dynamic Positioning Assistance Data for 5G UE
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently providing positioning assistance data to user equipment (UE) due to limitations in spectral efficiency, power consumption, and the need for precise positioning in 5G networks, particularly with the increased complexity of transmission reception points (TRPs) and varying data validity periods.
Innovation Solution
A method involving the reception of first positioning assistance data (AD) by UE, followed by an indication to the network, and subsequent receipt of second positioning AD that is differential or supplemental relative to the first, allowing for optimized use of TRP resources based on bitmaps indicating resource usage, thereby reducing overhead and improving positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If positioning assistance data is provided to all UEs, then positioning accuracy is improved, but spectral efficiency deteriorates due to redundant data transmission
Solution Approach 1:
The patent applies local quality by providing positioning assistance data selectively to specific UEs based on their individual needs and capabilities. The LMF determines which UEs require positioning AD and what type of AD they need, rather than broadcasting to all UEs uniformly. This targeted approach maintains positioning accuracy for UEs that need it while reducing unnecessary data transmission to UEs that don't require positioning assistance.
Solution Approach 2:
The patent segments positioning assistance data into different types (broadcast AD and dedicated AD) and delivers them through different channels. Broadcast positioning AD is provided to multiple UEs via system information blocks, while dedicated positioning AD is provided individually to specific UEs. This segmentation allows the system to optimize data transmission efficiency while ensuring each UE receives the appropriate level of positioning assistance.
2Reliability
If complete positioning assistance data is transmitted, then positioning reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts and transmits only the necessary positioning assistance data elements for each UE based on their specific positioning requirements and capabilities. The LMF determines the minimal set of AD parameters needed for reliable positioning and transmits only those, rather than sending complete positioning AD sets to all UEs. This extraction approach maintains positioning reliability while significantly reducing signaling overhead.
Solution Approach 2:
The patent implements dynamic positioning assistance data transmission where the LMF adapts the type and amount of positioning AD provided based on real-time UE positioning requests, UE capabilities, and network conditions. The system dynamically switches between providing broadcast AD, dedicated AD, or both, depending on the specific positioning scenario and UE needs, optimizing the balance between reliability and overhead.
3Measurement precision
If positioning assistance data is updated frequently, then positioning precision is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic positioning assistance data updates only when necessary, triggered by specific events such as UE positioning requests, changes in positioning requirements, or expiration of data validity periods. Rather than continuously updating positioning AD, the system uses event-triggered periodic updates that maintain positioning precision while minimizing unnecessary processing and power consumption at the UE.
Solution Approach 2:
The patent changes the update frequency and type of positioning assistance data based on UE positioning requirements and network conditions. For UEs requiring high precision positioning, the system provides more frequent and detailed updates, while for UEs with less demanding requirements, updates are less frequent and more concise. This adaptive parameter adjustment optimizes the balance between positioning precision and power consumption.
Data Source
AI summary
In an aspect, a UE receives first positioning assistance data (AD). The UE transmits an indication to a network component (e.g., BS, core network component, LMF, etc.) that the UE has received the first positioning AD. The network component determines second positioning AD that is based at least in part upon the first positioning AD. The network component transmits the second positioning AD to the UE.