Relative Positioning Assistance Data for Wireless Networks
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Solution Overview
Problem
The existing techniques for providing positioning assistance data in wireless networks face challenges in efficiently delivering large amounts of data needed for accurate UE-based positioning, leading to costly and difficult network resource management.
Innovation Solution
The proposed solution involves determining relative location information for TRPs based on absolute location information for a reference TRP and transmitting this relative information to UEs as positioning assistance data, which can include absolute location information for the reference TRP.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If absolute location information for all TRPs is provided to UEs, then positioning accuracy is improved, but signaling overhead and network resource consumption increase
Solution Approach 1:
The patent extracts only the essential reference TRP location information and relative location differences, rather than transmitting complete absolute location data for all TRPs. This selective extraction reduces the volume of assistance data while preserving positioning accuracy, as UEs can reconstruct full location information by combining reference TRP data with relative offsets.
Solution Approach 2:
Instead of providing absolute location information for each TRP directly, the patent inverts the approach by providing a reference TRP's absolute location and then providing relative location differences from that reference. This inversion reduces data redundancy since multiple TRPs can share the same reference TRP, and only differential values need to be transmitted.
2Reliability
If comprehensive positioning assistance data is transmitted to UEs, then positioning reliability is improved, but network signaling cost increases
Solution Approach 1:
The patent merges the location information of multiple TRPs by establishing a reference TRP and expressing other TRP locations relative to it. This consolidation reduces redundancy in the assistance data, as multiple TRPs that share the same reference TRP can be represented compactly using relative offsets rather than repeating full absolute coordinates for each TRP.
Solution Approach 2:
The patent provides partial location information (relative offsets) rather than complete absolute location data for all TRPs. This partial action approach maintains positioning reliability because UEs can derive full location information by combining the reference TRP's absolute location with the provided relative offsets, while significantly reducing the amount of data that must be transmitted through network signaling.
Data Source
AI summary
Embodiments include methods, performed by a network node, for providing positioning assistance data to one or more user equipment (UEs) in a wireless network. Such methods include determining relative location information for one or more transmission reception points (TRPs) in the wireless network based on absolute location information for an associated TRP in the wireless network. Such methods also include transmitting, to one or more UEs, positioning assistance data including the relative location information for the one or more TRPs. Other embodiments include complementary methods for a UE, as well as network nodes and UEs configured to perform such methods.