Mobile Terminal Positioning Using Reference Signals and Assistance Data
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Solution Overview
Problem
Current positioning techniques in 5G cellular networks face challenges in achieving high accuracy while minimizing resource usage and reducing latency, especially when dealing with a large number of users, due to high resource overhead and positioning latency in network-based methods, and limited precision in device-based methods without network assistance.
Innovation Solution
A mobile terminal configured to receive reference signals and positioning assistance information, such as antenna configuration and geometry-related data, to determine its own position in a device-based manner, reducing network resource usage and enhancing accuracy compared to traditional network-based or device-based methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If network-based positioning techniques are used, then positioning accuracy is improved, but resource overhead and positioning latency increase
Solution Approach 1:
The positioning system is segmented into network-based components (reference signals, positioning assistance information) and device-based components (local position determination). The network provides reference signals and assistance information, while the mobile terminal performs local calculations to determine its position, dividing the computational burden and resource usage between network and device.
Solution Approach 2:
The network performs preliminary actions by transmitting reference signals and positioning assistance information (including antenna configuration and geometry data) to the mobile terminal before the actual position calculation. This preliminary provision of data enables the device to perform accurate local calculations without requiring continuous network computation resources.
2Measurement precision
If network-based positioning techniques are used, then positioning accuracy is improved, but positioning latency increases
Solution Approach 1:
The positioning process is segmented into network transmission phase (reference signals and assistance information) and device calculation phase (local position determination). This segmentation allows the mobile terminal to perform calculations locally without waiting for network computation and response, significantly reducing positioning latency while maintaining accuracy.
Solution Approach 2:
The mobile terminal performs self-service by determining its own position locally using received reference signals and positioning assistance information. The device calculates its position autonomously without requiring the network to perform the computation and return results, thereby eliminating network processing latency.
3Quantity of substance
If device-based positioning is used, then resource overhead is reduced, but positioning accuracy deteriorates
Solution Approach 1:
Positioning assistance information acts as an intermediary between the network and the device-based positioning calculation. This assistance information (containing antenna configuration, geometry data, and reference signal parameters) enables the mobile terminal to perform accurate local position determination that would otherwise require more complex device capabilities or continuous network support.
4Measurement precision
If network-based positioning is used to support massive number of users, then positioning accuracy is maintained, but uplink congestion occurs
Solution Approach 1:
Each mobile terminal performs self-service position determination locally using received reference signals and positioning assistance information. This eliminates the need for uplink feedback of measurement reports to the network, allowing the system to support massive numbers of users simultaneously without uplink congestion, while each user maintains accurate positioning independently.
Data Source
AI summary
The present invention relates to devices and methods for determining a position of a mobile terminal with assistance from a wireless communication system. The mobile terminal is configured to receive a reference signal from a reference point of the wireless communication system, to receive positioning assistance information related to the reference point, and to determine its position based on the positioning assistance information and the reference signal.