Relative TRP Beam Configuration for Low-Overhead UE Positioning
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Solution Overview
Problem
The amount of assistance data needed for UE-based positioning in wireless networks can be large, making timely delivery via available network resources costly and difficult.
Innovation Solution
Providing positioning assistance data that includes relative beam configuration information for transmission reception points (TRPs), which can be transmitted to UEs, allowing them to determine their own position using this data and measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If absolute beam configuration information is provided to UEs for positioning, then positioning accuracy is improved, but the amount of data to be transmitted increases significantly
Solution Approach 1:
The patent combines multiple TRP beam configuration information into a unified positioning assistance data structure that includes both absolute and relative beam information. By merging the configuration data for multiple transmission reception points into a single assistance data message, the system reduces redundant transmissions while maintaining complete positioning information.
Solution Approach 2:
Instead of providing only absolute beam configuration information from the network to UEs, the patent inverts the approach by having UEs determine their position using relative beam configuration information between TRPs. This inversion allows UEs to calculate positions based on differential measurements, significantly reducing the amount of assistance data that must be transmitted from the network.
2Reliability
If complete positioning assistance data is transmitted to UEs, then positioning reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent segments positioning assistance data into multiple components: common TRP configuration information, individual TRP beam configuration information, and relative position relationships. This segmentation allows the system to transmit only essential information to UEs while maintaining complete positioning capability through structured data organization and selective transmission.
Solution Approach 2:
The patent introduces relative beam configuration information as an intermediary element between absolute TRP configurations and UE position calculations. This intermediary allows UEs to derive accurate position information without receiving complete absolute configuration data for all TRPs, thereby reducing signaling overhead while maintaining positioning reliability.
3Productivity
If relative beam configuration information is used instead of absolute configuration, then data transmission efficiency is improved, but UE processing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and providing relative beam configuration information between TRPs in the positioning assistance data. This pre-computed relative information allows UEs to perform simpler differential calculations rather than complex absolute coordinate transformations, reducing UE processing complexity while maintaining transmission efficiency benefits.
Data Source
AI summary
Embodiments include methods, performed by a network node (or function), for providing positioning assistance data to one or more user equipment (UEs) in a wireless network. Such methods include determining relative beam configuration information for one or more transmission reception points (TRPs) in the wireless network based on absolute beam configuration information for one or more associated TRPs in the wireless network. Such methods also include transmitting, to one or more UEs, positioning assistance data including the relative beam configuration information for the one or more TRPs. Embodiments also include complementary methods performed by a UE, as well as network nodes (or functions) and UEs configured to perform such methods.