User Device Positioning Using Assistance Data Sets
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Solution Overview
Problem
In wireless communication networks, user devices (UEs) face challenges in determining their position accurately, especially in non-connected states like RRC_INACTIVE or RRC_IDLE, where assistance data for positioning measurements becomes outdated due to reduced connectivity, leading to inefficient positioning processes.
Innovation Solution
The implementation of a system where UEs receive and utilize assistance data sets with multiple instances, each applicable to specific areas within the network, allowing them to activate the appropriate data based on their current location, even in non-connected states, through paging mechanisms and extended data validity to ensure accurate positioning measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If UEs use assistance data for positioning measurements in non-connected states, then positioning measurements can be performed with reduced connectivity, but the assistance data becomes outdated due to UE movement, leading to reduced positioning accuracy
Solution Approach 1:
The network pre-provides multiple assistance data instances to the UE before the UE moves to non-connected state. Each instance is associated with a specific geographic area identifier. The UE can then select and activate the appropriate instance based on its current location without needing to return to connected state, ensuring data freshness and positioning accuracy.
Solution Approach 2:
The system implements dynamic assistance data management where multiple instances with different area validities are maintained. The UE can dynamically switch between instances based on location changes detected through paging messages or area identifier comparisons, ensuring the most current location-appropriate data is used for positioning measurements.
2Measurement precision
If UEs return to connected state to update assistance data, then positioning accuracy is maintained, but signaling overhead and network resources increase
Solution Approach 1:
Multiple assistance data instances are pre-configured and provided to the UE in advance while it is in connected state. This preliminary provisioning eliminates the need for frequent connected-state transitions solely for data updates, reducing signaling overhead while maintaining accuracy through instance selection.
Solution Approach 2:
The UE autonomously manages assistance data by monitoring paging messages for area identifier changes and self-selecting the appropriate data instance based on its current location. This self-service mechanism eliminates the need for network-initiated data updates and reduces signaling requirements while maintaining positioning accuracy.
3Measurement precision
If multiple assistance data instances are provided for different locations, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The assistance data is segmented into multiple independent instances, each associated with a specific geographic area identifier. This segmentation allows the UE to manage and select instances based on location without processing all data simultaneously, reducing memory and computational requirements while improving positioning accuracy through location-specific data selection.
Solution Approach 2:
The UE is pre-configured with multiple assistance data instances and their associated area identifiers before entering non-connected state. This preliminary organization enables simple instance selection based on area identifier matching without complex real-time data processing, reducing device complexity while maintaining positioning accuracy.
Data Source
AI summary
A user device, UE, of a wireless communication network is described that, for determining a position of the UE in accordance with a positioning procedure, performs positioning measurements. The UE includes an assistance data, AD, set, and the AD set includes a plurality of assistance data, AD, instances. Each AS instance is applicable for the UE to perform the positioning measurements at a certain location in the wireless communication network. The UE is to perform the positioning measurements in accordance with the assistance data, AD, instance applicable for the UE at a current location of the UE in the wireless communication network.