Positioning Reference Signal Classification for Wireless Terminals
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently classifying and utilizing positioning reference signals, particularly in dense areas and indoor environments, due to limitations in data traffic handling and positioning accuracy.
Innovation Solution
A method for hierarchically classifying and defining positioning reference signals, including the transmission of both cell-specific and UE-specific signals, with control information exchanged through backhaul signaling to optimize positioning in terminals, allowing for efficient measurement and reporting of reference signal time differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If positioning reference signals are transmitted frequently to improve positioning accuracy, then positioning precision is improved, but network overhead and energy consumption increase
Solution Approach 1:
The patent applies dynamics by transitioning from static, periodic positioning reference signal transmission to dynamic, event-triggered transmission. The system monitors terminal movement status and only transmits positioning reference signals when the terminal is in a moving state or when positioning is actually needed, thereby reducing unnecessary energy consumption while maintaining positioning accuracy when required.
Solution Approach 2:
The patent uses periodic action through configured measurement intervals and periodic positioning reference signal transmission. The network can configure the terminal to measure and report positioning information at specific intervals or when certain conditions are met, balancing the need for continuous positioning with energy conservation by avoiding constant signal transmission.
2Measurement precision
If positioning reference signals are transmitted in dense areas and indoor environments to improve positioning accuracy, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by differentiating positioning reference signal transmission based on location characteristics. The system identifies whether the terminal is in a dense area or indoor environment and adjusts the positioning reference signal transmission strategy accordingly. In such specific environments, the system activates enhanced positioning modes with more frequent or targeted signal transmission, while using standard modes in other environments, thereby avoiding unnecessary complexity throughout the entire network.
Solution Approach 2:
The patent segments the positioning reference signal transmission into different types: first positioning reference signals for general positioning and second positioning reference signals for enhanced positioning in specific environments. This segmentation allows the system to apply different transmission strategies for different scenarios, managing complexity by only implementing enhanced mechanisms where necessary rather than uniformly across all cases.
3Adaptability or versatility
If multiple positioning reference signals are transmitted to enhance positioning capability, then adaptability is improved, but loss of information increases
Solution Approach 1:
The patent segments positioning reference signals into first positioning reference signals (cell-specific, transmitted periodically) and second positioning reference signals (UE-specific, transmitted aperiodically). This segmentation allows different types of positioning information to be conveyed through different signal types, reducing interference between signals carrying the same information while maintaining overall adaptability for various positioning scenarios.
Solution Approach 2:
The patent uses control information as an intermediary to manage the transmission of positioning reference signals. The control information indicates when and where second positioning reference signals should be transmitted, allowing the system to coordinate multiple signals without causing information loss or interference. This intermediary layer enables adaptive signal transmission while maintaining signal integrity.
Data Source
AI summary
The present invention provides a method for performing positioning by a terminal in a wireless communication system including: receiving assistance data including reference cell information (ReferenceCellInfo) and neighboring cell information (NeighbourCellInfo) from a serving base station; receiving a positioning reference signal from each of a reference cell and at least one neighboring cell based on the received assistance data; measuring a reference signal time difference (RSTD) for the reference cell of at least one neighboring cell by using the received positioning reference signal; and reporting the measured RSTD to the serving base station.