Wireless Positioning via Interference-Resistant Reference Signals
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Solution Overview
Problem
Current wireless communication systems face challenges in accurately determining the position of terminal devices due to interference and collision issues during positioning reference signal transmissions, which affect the reliability and accuracy of positioning services, especially in environments with diverse latency and accuracy requirements.
Innovation Solution
The system employs a method where a network entity transmits parameter settings for positioning reference signal transmissions to both transmission-reception points and terminal devices, using contention-based access and retransmission timeouts, and collects reports on successful transmissions and measurement data to determine the device's position, minimizing interference by filtering out corrupted measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If positioning reference signal transmissions are performed in wireless communication systems, then positioning services can be provided to terminal devices, but interference and collision issues occur during transmissions which reduce reliability and accuracy
Solution Approach 1:
The network entity configures transmission parameters and resource allocations for positioning reference signals before transmissions occur. This preliminary configuration establishes predetermined time-frequency resources and transmission patterns for multiple transmission-reception points, preventing interference and collisions by ensuring that signals are transmitted on orthogonal or non-conflicting resources from the outset
Solution Approach 2:
The network entity acts as an intermediary that coordinates and manages the positioning reference signal transmissions between multiple transmission-reception points and terminal devices. It configures and controls the transmission parameters, resource allocations, and timing for all TRPs, ensuring that their transmissions do not interfere with each other while providing positioning services to UEs
2Measurement precision
If multiple transmission-reception points transmit positioning reference signals simultaneously, then positioning accuracy can be improved through multiple measurements, but interference between transmissions increases
Solution Approach 1:
The network entity segments the positioning reference signal transmissions by allocating distinct time-frequency resources to different transmission-reception points. Each TRP is assigned specific resources where it transmits positioning signals without overlapping with other TRPs, allowing multiple points to contribute to positioning accuracy while avoiding mutual interference through resource division
Solution Approach 2:
The system employs periodic transmission of positioning reference signals with configured periodicity and timing offsets. Different transmission-reception points transmit at different times within the periodic structure, ensuring that measurements can be taken at multiple points in time while avoiding simultaneous transmissions that would cause interference
Data Source
AI summary
To position a terminal device, at least one transmission-reception point, or corresponding apparatus, the terminal device and a network entity exchange information. A transmission-reception point receives from the network entity a first signal comprising at least one parameter setting for positioning reference signal transmissions. The terminal device receives from the network entity a second signal comprising at least the parameter setting. The network entity receives from the transmission-reception point a first report indicating at least an occurrence time of a successful transmission of a positioning reference signal and from the terminal device a measurement report comprising information on at least the positioning reference signal. The network entity determines a position of the terminal device based on at least the first report and the measurement report.